diff --git a/openslides/agenda/views.py b/openslides/agenda/views.py
index a61f38e67..dc3f34935 100644
--- a/openslides/agenda/views.py
+++ b/openslides/agenda/views.py
@@ -4,6 +4,7 @@ from cgi import escape
 from collections import defaultdict
 from json import dumps
 
+from django.contrib.auth import get_user_model
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.staticfiles.templatetags.staticfiles import static
 from django.template.loader import render_to_string
@@ -18,8 +19,15 @@ from openslides.projector.api import (
     get_active_object,
     get_projector_overlays_js,
     get_overlays)
+from openslides.utils.exceptions import OpenSlidesError
 from openslides.utils.pdf import stylesheet
-from openslides.utils.rest_api import ModelViewSet, list_route, Response
+from openslides.utils.rest_api import (
+    ModelViewSet,
+    Response,
+    ValidationError,
+    detail_route,
+    list_route,
+)
 from openslides.utils.views import (
     AjaxMixin,
     PDFView,
@@ -27,7 +35,7 @@ from openslides.utils.views import (
     SingleObjectMixin,
     TemplateView)
 
-from .models import Item
+from .models import Item, Speaker
 from .serializers import ItemSerializer
 
 
@@ -208,6 +216,137 @@ class ItemViewSet(ModelViewSet):
             queryset = queryset.exclude(type__exact=Item.ORGANIZATIONAL_ITEM)
         return queryset
 
+    @detail_route(methods=['POST', 'DELETE'])
+    def manage_speaker(self, request, pk=None):
+        """
+        Special view endpoint to add users to the list of speakers or remove
+        them. Send POST {'user': <user_id>} to add a new speaker. Omit
+        data to add yourself. Send DELETE {'speaker': <speaker_id>} to remove
+        someone from the list of speakers. Omit data to remove yourself.
+
+        Checks also whether the requesting user can do this. He needs at
+        least the permissions 'agenda.can_see' (see
+        self.check_permission()). In case of adding himself the permission
+        'agenda.can_be_speaker' is required. In case of adding someone else
+        the permission 'agenda.can_manage' is required. In case of removing
+        someone else 'agenda.can_manage' is required. In case of removing
+        himself no other permission is required.
+        """
+        # Retrieve item.
+        item = self.get_object()
+
+        if request.method == 'POST':
+            # Retrieve user_id
+            user_id = request.data.get('user')
+
+            # Check permissions and other conditions. Get user instance.
+            if user_id is None:
+                # Add oneself
+                if not self.request.user.has_perm('agenda.can_be_speaker'):
+                    self.permission_denied(request)
+                if item.speaker_list_closed:
+                    raise ValidationError({'detail': _('The list of speakers is closed.')})
+                user = self.request.user
+            else:
+                # Add someone else.
+                if not self.request.user.has_perm('agenda.can_manage'):
+                    self.permission_denied(request)
+                try:
+                    user = get_user_model().objects.get(pk=int(user_id))
+                except (ValueError, get_user_model().DoesNotExist):
+                    raise ValidationError({'detail': _('User does not exist.')})
+
+            # Try to add the user. This ensurse that a user is not twice in the
+            # list of coming speakers.
+            try:
+                Speaker.objects.add(user, item)
+            except OpenSlidesError as e:
+                raise ValidationError({'detail': e})
+            message = _('User %s was successfully added to the list of speakers.') % user
+
+        else:
+            # request.method == 'DELETE'
+            # Retrieve speaker_id
+            speaker_id = request.data.get('speaker')
+
+            # Check permissions and other conditions. Get speaker instance.
+            if speaker_id is None:
+                # Remove oneself
+                queryset = Speaker.objects.filter(
+                    item=item, user=self.request.user).exclude(weight=None)
+                try:
+                    # We assume that there aren't multiple entries because this
+                    # is forbidden by the Manager's add method. We assume that
+                    # there is only one speaker instance or none.
+                    speaker = queryset.get()
+                except Speaker.DoesNotExist:
+                    raise ValidationError({'detail': _('You are not on the list of speakers.')})
+            else:
+                # Remove someone else.
+                if not self.request.user.has_perm('agenda.can_manage'):
+                    self.permission_denied(request)
+                try:
+                    speaker = Speaker.objects.get(pk=int(speaker_id))
+                except (ValueError, Speaker.DoesNotExist):
+                    raise ValidationError({'detail': _('Speaker does not exist.')})
+
+            # Delete the speaker.
+            speaker.delete()
+            message = _('Speaker %s was successfully removed from the list of speakers.') % speaker
+
+        # Initiate response.
+        return Response({'detail': message})
+
+    @detail_route(methods=['PUT', 'DELETE'])
+    def speak(self, request, pk=None):
+        """
+        Special view endpoint to begin and end speach of speakers. Send PUT
+        {'speaker': <speaker_id>} to begin speach. Omit data to begin speach of
+        the next speaker. Send DELETE to end speach of current speaker.
+
+        Checks also whether the requesting user can do this. He needs at
+        least the permissions 'agenda.can_see' (see
+        self.check_permission()). Also the permission 'agenda.can_manage'
+        is required.
+        """
+        # Check permission.
+        if not self.request.user.has_perm('agenda.can_manage'):
+            self.permission_denied(request)
+
+        # Retrieve item.
+        item = self.get_object()
+
+        if request.method == 'PUT':
+            # Retrieve speaker_id
+            speaker_id = request.data.get('speaker')
+            if speaker_id is None:
+                speaker = item.get_next_speaker()
+                if speaker is None:
+                    raise ValidationError({'detail': _('The list of speakers is empty.')})
+            else:
+                try:
+                    speaker = Speaker.objects.get(pk=int(speaker_id))
+                except (ValueError, Speaker.DoesNotExist):
+                    raise ValidationError({'detail': _('Speaker does not exist.')})
+            speaker.begin_speach()
+            message = _('User is now speaking.')
+
+        else:
+            # request.method == 'DELETE'
+            try:
+                # We assume that there aren't multiple entries because this
+                # is forbidden by the Model's begin_speach method. We assume that
+                # there is only one speaker instance or none.
+                current_speaker = Speaker.objects.filter(item=item, end_time=None).exclude(begin_time=None).get()
+            except Speaker.DoesNotExist:
+                raise ValidationError(
+                    {'detail': _('There is no one speaking at the moment according to %(item)s.') % {'item': item}})
+            current_speaker.end_speach()
+            message = _('The speach is finished now.')
+
+        # Initiate response.
+        return Response({'detail': message})
+
     @list_route(methods=['get', 'put'])
     def tree(self, request):
         """
diff --git a/tests/integration/agenda/test_viewsets.py b/tests/integration/agenda/test_viewsets.py
new file mode 100644
index 000000000..0e6e8a468
--- /dev/null
+++ b/tests/integration/agenda/test_viewsets.py
@@ -0,0 +1,179 @@
+from django.contrib.auth import get_user_model
+from django.core.urlresolvers import reverse
+from rest_framework.test import APIClient
+
+from openslides.agenda.models import Item, Speaker
+from openslides.utils.test import TestCase
+
+
+class ManageSpeaker(TestCase):
+    """
+    Tests managing speakers.
+    """
+    def setUp(self):
+        self.client = APIClient()
+        self.client.login(username='admin', password='admin')
+        self.item = Item.objects.create(title='test_title_aZaedij4gohn5eeQu8fe')
+        self.user = get_user_model().objects.create_user(
+            username='test_user_jooSaex1bo5ooPhuphae',
+            password='test_password_e6paev4zeeh9n')
+
+    def test_add_oneself(self):
+        response = self.client.post(
+            reverse('item-manage-speaker', args=[self.item.pk]))
+        self.assertEqual(response.status_code, 200)
+        self.assertTrue(Speaker.objects.all().exists())
+
+    def test_add_oneself_twice(self):
+        Speaker.objects.add(get_user_model().objects.get(username='admin'), self.item)
+        response = self.client.post(
+            reverse('item-manage-speaker', args=[self.item.pk]))
+        self.assertEqual(response.status_code, 400)
+
+    def test_add_oneself_when_closed(self):
+        self.item.speaker_list_closed = True
+        self.item.save()
+        response = self.client.post(
+            reverse('item-manage-speaker', args=[self.item.pk]))
+        self.assertEqual(response.status_code, 400)
+
+    def test_remove_oneself(self):
+        Speaker.objects.add(get_user_model().objects.get(username='admin'), self.item)
+        response = self.client.delete(
+            reverse('item-manage-speaker', args=[self.item.pk]))
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(Speaker.objects.all().exists())
+
+    def test_remove_self_not_on_list(self):
+        response = self.client.delete(
+            reverse('item-manage-speaker', args=[self.item.pk]))
+        self.assertEqual(response.status_code, 400)
+
+    def test_add_someone_else(self):
+        response = self.client.post(
+            reverse('item-manage-speaker', args=[self.item.pk]),
+            {'user': self.user.pk})
+        self.assertEqual(response.status_code, 200)
+        self.assertTrue(Speaker.objects.filter(item=self.item, user=self.user).exists())
+
+    def test_invalid_data_string_instead_of_integer(self):
+        response = self.client.post(
+            reverse('item-manage-speaker', args=[self.item.pk]),
+            {'user': 'string_instead_of_integer'})
+
+        self.assertEqual(response.status_code, 400)
+
+    def test_invalid_data_user_does_not_exist(self):
+        # ID of a user that does not exist.
+        # Be careful: Here we do not test that the user does not exist.
+        inexistent_user_pk = self.user.pk + 1000
+        response = self.client.post(
+            reverse('item-manage-speaker', args=[self.item.pk]),
+            {'user': inexistent_user_pk})
+        self.assertEqual(response.status_code, 400)
+
+    def test_add_someone_else_twice(self):
+        Speaker.objects.add(self.user, self.item)
+        response = self.client.post(
+            reverse('item-manage-speaker', args=[self.item.pk]),
+            {'user': self.user.pk})
+        self.assertEqual(response.status_code, 400)
+
+    def test_add_someone_else_non_admin(self):
+        admin = get_user_model().objects.get(username='admin')
+        group_staff = admin.groups.get(name='Staff')
+        group_delegates = type(group_staff).objects.get(name='Delegates')
+        admin.groups.add(group_delegates)
+        admin.groups.remove(group_staff)
+        response = self.client.post(
+            reverse('item-manage-speaker', args=[self.item.pk]),
+            {'user': self.user.pk})
+        self.assertEqual(response.status_code, 403)
+
+    def test_remove_someone_else(self):
+        speaker = Speaker.objects.add(self.user, self.item)
+        response = self.client.delete(
+            reverse('item-manage-speaker', args=[self.item.pk]),
+            {'speaker': speaker.pk})
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(Speaker.objects.filter(item=self.item, user=self.user).exists())
+
+    def test_remove_someone_else_not_on_list(self):
+        response = self.client.delete(
+            reverse('item-manage-speaker', args=[self.item.pk]),
+            {'speaker': '1'})
+        self.assertEqual(response.status_code, 400)
+
+    def test_remove_someone_else_invalid_data(self):
+        response = self.client.delete(
+            reverse('item-manage-speaker', args=[self.item.pk]),
+            {'speaker': 'invalid'})
+        self.assertEqual(response.status_code, 400)
+
+    def test_remove_someone_else_non_admin(self):
+        admin = get_user_model().objects.get(username='admin')
+        group_staff = admin.groups.get(name='Staff')
+        group_delegates = type(group_staff).objects.get(name='Delegates')
+        admin.groups.add(group_delegates)
+        admin.groups.remove(group_staff)
+        speaker = Speaker.objects.add(self.user, self.item)
+        response = self.client.delete(
+            reverse('item-manage-speaker', args=[self.item.pk]),
+            {'speaker': speaker.pk})
+        self.assertEqual(response.status_code, 403)
+
+
+class Speak(TestCase):
+    """
+    Tests view to begin or end speach.
+    """
+    def setUp(self):
+        self.client = APIClient()
+        self.client.login(username='admin', password='admin')
+        self.item = Item.objects.create(title='test_title_KooDueco3zaiGhiraiho')
+        self.user = get_user_model().objects.create_user(
+            username='test_user_Aigh4vohb3seecha4aa4',
+            password='test_password_eneupeeVo5deilixoo8j')
+
+    def test_begin_speach(self):
+        Speaker.objects.add(self.user, self.item)
+        speaker = Speaker.objects.add(get_user_model().objects.get(username='admin'), self.item)
+        self.assertTrue(Speaker.objects.get(pk=speaker.pk).begin_time is None)
+        response = self.client.put(
+            reverse('item-speak', args=[self.item.pk]),
+            {'speaker': speaker.pk})
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(Speaker.objects.get(pk=speaker.pk).begin_time is None)
+
+    def test_begin_speach_next_speaker(self):
+        speaker = Speaker.objects.add(self.user, self.item)
+        Speaker.objects.add(get_user_model().objects.get(username='admin'), self.item)
+        self.assertTrue(Speaker.objects.get(pk=speaker.pk).begin_time is None)
+        response = self.client.put(reverse('item-speak', args=[self.item.pk]))
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(Speaker.objects.get(pk=speaker.pk).begin_time is None)
+
+    def test_begin_speach_invalid_speaker_id(self):
+        response = self.client.put(
+            reverse('item-speak', args=[self.item.pk]),
+            {'speaker': '1'})
+        self.assertEqual(response.status_code, 400)
+
+    def test_begin_speach_invalid_data(self):
+        response = self.client.put(
+            reverse('item-speak', args=[self.item.pk]),
+            {'speaker': 'invalid'})
+        self.assertEqual(response.status_code, 400)
+
+    def test_end_speach(self):
+        speaker = Speaker.objects.add(get_user_model().objects.get(username='admin'), self.item)
+        speaker.begin_speach()
+        self.assertFalse(Speaker.objects.get(pk=speaker.pk).begin_time is None)
+        self.assertTrue(Speaker.objects.get(pk=speaker.pk).end_time is None)
+        response = self.client.delete(reverse('item-speak', args=[self.item.pk]))
+        self.assertEqual(response.status_code, 200)
+        self.assertFalse(Speaker.objects.get(pk=speaker.pk).end_time is None)
+
+    def test_end_speach_no_current_speaker(self):
+        response = self.client.delete(reverse('item-speak', args=[self.item.pk]))
+        self.assertEqual(response.status_code, 400)
diff --git a/tests/unit/agenda/test_views.py b/tests/unit/agenda/test_views.py
new file mode 100644
index 000000000..7945d0d8b
--- /dev/null
+++ b/tests/unit/agenda/test_views.py
@@ -0,0 +1,91 @@
+from unittest import TestCase
+from unittest.mock import MagicMock, patch
+
+from openslides.agenda.views import ItemViewSet
+
+
+class ItemViewSetManageSpeaker(TestCase):
+    """
+    Tests views of ItemViewSet to manage speakers.
+    """
+    def setUp(self):
+        self.request = MagicMock()
+        self.view_instance = ItemViewSet()
+        self.view_instance.request = self.request
+        self.view_instance.get_object = get_object_mock = MagicMock()
+        get_object_mock.return_value = self.mock_item = MagicMock()
+
+    @patch('openslides.agenda.views.Speaker')
+    def test_add_oneself_as_speaker(self, mock_speaker):
+        self.request.method = 'POST'
+        self.request.user.has_perm.return_value = True
+        self.request.data = {}
+        self.mock_item.speaker_list_closed = False
+        self.view_instance.manage_speaker(self.request)
+        mock_speaker.objects.add.assert_called_with(self.request.user, self.mock_item)
+
+    @patch('openslides.agenda.views.get_user_model')
+    @patch('openslides.agenda.views.Speaker')
+    def test_add_someone_else_as_speaker(self, mock_speaker, mock_get_user_model):
+        self.request.method = 'POST'
+        self.request.user.has_perm.return_value = True
+        self.request.data = {'user': '2'}  # It is assumed that the request user has pk!=2.
+        mock_get_user_model.return_value = MockUser = MagicMock()
+        MockUser.objects.get.return_value = mock_user = MagicMock()
+        self.view_instance.manage_speaker(self.request)
+        MockUser.objects.get.assert_called_with(pk=2)
+        mock_speaker.objects.add.assert_called_with(mock_user, self.mock_item)
+
+    @patch('openslides.agenda.views.Speaker')
+    def test_remove_oneself(self, mock_speaker):
+        self.request.method = 'DELETE'
+        self.request.data = {}
+        self.view_instance.manage_speaker(self.request)
+        mock_queryset = mock_speaker.objects.filter.return_value.exclude.return_value
+        mock_queryset.get.return_value.delete.assert_called_with()
+
+    @patch('openslides.agenda.views.Speaker')
+    def test_remove_someone_else(self, mock_speaker):
+        self.request.method = 'DELETE'
+        self.request.user.has_perm.return_value = True
+        self.request.data = {'speaker': '1'}
+        self.view_instance.manage_speaker(self.request)
+        mock_speaker.objects.get.assert_called_with(pk=1)
+        mock_speaker.objects.get.return_value.delete.assert_called_with()
+
+
+class ItemViewSetSpeak(TestCase):
+    """
+    Tests views of ItemViewSet to begin and end speach.
+    """
+    def setUp(self):
+        self.request = MagicMock()
+        self.view_instance = ItemViewSet()
+        self.view_instance.request = self.request
+        self.view_instance.get_object = get_object_mock = MagicMock()
+        get_object_mock.return_value = self.mock_item = MagicMock()
+
+    def test_begin_speach(self):
+        self.request.method = 'PUT'
+        self.request.user.has_perm.return_value = True
+        self.request.data = {}
+        self.mock_item.get_next_speaker.return_value = mock_next_speaker = MagicMock()
+        self.view_instance.speak(self.request)
+        mock_next_speaker.begin_speach.assert_called_with()
+
+    @patch('openslides.agenda.views.Speaker')
+    def test_begin_speach_specific_speaker(self, mock_speaker):
+        self.request.method = 'PUT'
+        self.request.user.has_perm.return_value = True
+        self.request.data = {'speaker': '1'}
+        mock_speaker.objects.get.return_value = mock_next_speaker = MagicMock()
+        self.view_instance.speak(self.request)
+        mock_next_speaker.begin_speach.assert_called_with()
+
+    @patch('openslides.agenda.views.Speaker')
+    def test_end_speach(self, mock_speaker):
+        self.request.method = 'DELETE'
+        self.request.user.has_perm.return_value = True
+        mock_speaker.objects.filter.return_value.exclude.return_value.get.return_value = mock_speaker = MagicMock()
+        self.view_instance.speak(self.request)
+        mock_speaker.end_speach.assert_called_with()