diff --git a/openslides/assignment/models.py b/openslides/assignment/models.py
index 7b7064ef1..805913d4e 100644
--- a/openslides/assignment/models.py
+++ b/openslides/assignment/models.py
@@ -38,6 +38,9 @@ class AssignmentCandidate(models.Model):
     def __unicode__(self):
         return unicode(self.person)
 
+    class Meta:
+        unique_together = ("assignment", "person")
+
 
 class Assignment(models.Model, SlideMixin):
     prefix = 'assignment'
@@ -83,12 +86,13 @@ class Assignment(models.Model, SlideMixin):
         if not person.has_perm("assignment.can_manage_assignment") and self.status != 'sea':
             raise NameError(_('The candidate list is already closed.'))
         candidation = self.assignment_candidats.filter(person=candidate)
-        if candidation and candidate != person:
+        if candidation and candidate != person and \
+                not person.has_perm("assignment.can_manage_assignment"):
             # if the candidation is blocked and anotherone tries to run the
             # candidate
             raise NameError(
                 _('The %s does not want to be a candidate.') % candidate)
-        elif candidation and candidate == person:
+        elif candidation:
             candidation[0].blocked = False
             candidation[0].save()
         else:
@@ -98,16 +102,21 @@ class Assignment(models.Model, SlideMixin):
         """
         stop running for a vote
         """
-        if self.is_candidate(candidate):
+        try:
             candidation = self.assignment_candidats.get(person=candidate)
+        except AssignmentCandidate.DoesNotExist:
+            # TODO: Use an OpenSlides Error
+            raise Exception(_('%s is no candidate') % candidate)
+
+        if not candidation.blocked:
             if blocked:
                 candidation.blocked = True
                 candidation.save()
             else:
                 candidation.delete()
         else:
-            # TODO: Use an OpenSlides Error
-            raise Exception(_('%s is no candidate') % candidate)
+            candidation.delete()
+
 
     def is_candidate(self, person):
         """
@@ -116,6 +125,13 @@ class Assignment(models.Model, SlideMixin):
         return self.assignment_candidats.filter(person=person) \
                    .exclude(blocked=True).exists()
 
+    def is_blocked(self, person):
+        """
+        return True, if the person is blockt for candidation.
+        """
+        return self.assignment_candidats.filter(person=person) \
+                   .filter(blocked=True).exists()
+
     @property
     def assignment_candidats(self):
         return AssignmentCandidate.objects.filter(assignment=self)
diff --git a/openslides/assignment/templates/assignment/view.html b/openslides/assignment/templates/assignment/view.html
index fc4feb615..d3414f2a0 100644
--- a/openslides/assignment/templates/assignment/view.html
+++ b/openslides/assignment/templates/assignment/view.html
@@ -88,8 +88,18 @@
 
     {% endif %}
     {% endif %}
-
-    <p><br></p>
+{% if perms.assignment.can_manage_assignments %}
+    <h3>{% trans "Blocked Candidates" %}</h3>
+    <ul>
+    {% for candidate in blocked_candidates %}
+        <li>
+            {{ candidate }}<a href="{% url assignment_delother assignment.id candidate.person_id %}"><img src="{% static 'images/icons/delete.png' %}" title="{% trans 'Remove candidate' %}"></a>
+        </li>
+    {% empty %}
+        <li>{% trans "There are no blocked candidates." %}</li>
+    {% endfor %}
+    </ul>
+{% endif %}
     <h3>{% trans "Election results" %}</h3>
 
 {% if polls.exists %}
diff --git a/openslides/assignment/views.py b/openslides/assignment/views.py
index 5271750c4..fdd727eda 100644
--- a/openslides/assignment/views.py
+++ b/openslides/assignment/views.py
@@ -100,13 +100,15 @@ def view(request, assignment_id=None):
         polls = assignment.poll_set.all()
         vote_results = assignment.vote_results(only_published=False)
 
+    blocked_candidates = [candidate.person for candidate in \
+        assignment.assignment_candidats.filter(blocked=True)]
     return {
         'assignment': assignment,
+        'blocked_candidates': blocked_candidates,
         'form': form,
         'vote_results': vote_results,
         'polls': polls,
-        'user_is_candidate': assignment.is_candidate(request.user)
-    }
+        'user_is_candidate': assignment.is_candidate(request.user)}
 
 
 @permission_required('assignment.can_manage_assignment')