diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 3d1656262..dbbc78568 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -37,6 +37,7 @@ Motions:
  - Added multi select action to manage submitters, tags, states and
    recommendations [#4037, #4132].
  - Added timestampes for motions [#4134].
+ - New config option to set reason as required field [#4232]
 
 User:
  - Added new admin group which grants all permissions. Users of existing group
diff --git a/client/src/app/core/marked-translations.ts b/client/src/app/core/marked-translations.ts
index f7dc5bc3c..937b73124 100644
--- a/client/src/app/core/marked-translations.ts
+++ b/client/src/app/core/marked-translations.ts
@@ -110,6 +110,7 @@ _('Default line numbering');
 _('disabled');
 _('Line length');
 _('The maximum number of characters per line. Relevant when line numbering is enabled. Min: 40');
+_('Reason required for creating new motion');
 _('Hide reason on projector');
 _('Hide meta information box on projector');
 _('Hide recommendation on projector');
diff --git a/client/src/app/site/motions/components/motion-detail/motion-detail.component.html b/client/src/app/site/motions/components/motion-detail/motion-detail.component.html
index 8a53a3a81..407e1f231 100644
--- a/client/src/app/site/motions/components/motion-detail/motion-detail.component.html
+++ b/client/src/app/site/motions/components/motion-detail/motion-detail.component.html
@@ -493,7 +493,11 @@
         ></div>
 
         <!-- The HTML Editor -->
-        <editor formControlName="text" [init]="tinyMceSettings" *ngIf="motion && editMotion"></editor>
+        <editor formControlName="text" [init]="tinyMceSettings" *ngIf="motion && editMotion" required></editor>
+        <div *ngIf="contentForm.get('text').invalid && (contentForm.get('text').dirty || contentForm.get('text').touched)"
+            class="red-warning-text" translate>
+            This field is required.
+        </div>
 
         <!-- Paragraph-based amendments -->
         <ng-container *ngIf="!editMotion && motion.isParagraphBasedAmendment()">
@@ -502,11 +506,17 @@
 
         <!-- Reason -->
         <div *ngIf="motion.reason || editMotion">
-            <h3 translate>Reason</h3>
+            <h3 [ngClass]="(reasonRequired && contentForm.get('reason').invalid && (contentForm.get('reason').dirty || contentForm.get('reason').touched)) ? 'red-warning-text' : ''">
+                <span translate>Reason</span>&nbsp;<span *ngIf="reasonRequired && editMotion">*</span>
+            </h3>
             <div class="motion-text" *ngIf="!editMotion"><div [innerHtml]="motion.reason"></div></div>
 
             <!-- The HTML Editor -->
-            <editor formControlName="reason" [init]="tinyMceSettings" *ngIf="editMotion"></editor>
+            <editor formControlName="reason" [init]="tinyMceSettings" *ngIf="editMotion" required></editor>
+            <div *ngIf="reasonRequired && contentForm.get('reason').invalid && (contentForm.get('reason').dirty || contentForm.get('reason').touched)"
+                class="red-warning-text" translate>
+                This field is required.
+            </div>
         </div>
 
         <!-- Category form -->
diff --git a/client/src/app/site/motions/components/motion-detail/motion-detail.component.ts b/client/src/app/site/motions/components/motion-detail/motion-detail.component.ts
index 4320ca0ce..48983b424 100644
--- a/client/src/app/site/motions/components/motion-detail/motion-detail.component.ts
+++ b/client/src/app/site/motions/components/motion-detail/motion-detail.component.ts
@@ -124,6 +124,11 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit {
      */
     public statutesEnabled: boolean;
 
+    /**
+     * Value of the config variable `motions_reason_required`
+     */
+    public reasonRequired: boolean;
+
     /**
      * Value of the config variable `motions_min_supporters`
      */
@@ -371,6 +376,7 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit {
 
         // load config variables
         this.configService.get('motions_statutes_enabled').subscribe(enabled => (this.statutesEnabled = enabled));
+        this.configService.get('motions_reason_required').subscribe(required => (this.reasonRequired = required));
         this.configService.get('motions_min_supporters').subscribe(supporters => (this.minSupporters = supporters));
         this.configService.get('motions_preamble').subscribe(preamble => (this.preamble = preamble));
         this.configService.get('motions_amendments_enabled').subscribe(enabled => (this.amendmentsEnabled = enabled));
@@ -520,11 +526,15 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit {
      * TODO: Build a custom form validator
      */
     public createForm(): void {
+        const reason: any[] = [''];
+        if (this.reasonRequired) {
+            reason.push(Validators.required);
+        }
         this.contentForm = this.formBuilder.group({
             identifier: [''],
             title: ['', Validators.required],
             text: ['', Validators.required],
-            reason: [''],
+            reason: reason,
             category_id: [''],
             attachments_id: [[]],
             agenda_parent_id: [],
diff --git a/openslides/motions/config_variables.py b/openslides/motions/config_variables.py
index 8abc91a4c..843dfd8e2 100644
--- a/openslides/motions/config_variables.py
+++ b/openslides/motions/config_variables.py
@@ -100,6 +100,16 @@ def get_config_variables():
         validators=(MinValueValidator(40),),
     )
 
+    yield ConfigVariable(
+        name="motions_reason_required",
+        default_value=False,
+        input_type="boolean",
+        label="Reason required for creating new motion",
+        weight=324,
+        group="Motions",
+        subgroup="General",
+    )
+
     yield ConfigVariable(
         name="motions_disable_reason_on_projector",
         default_value=False,
diff --git a/openslides/motions/serializers.py b/openslides/motions/serializers.py
index eb273407b..55336f903 100644
--- a/openslides/motions/serializers.py
+++ b/openslides/motions/serializers.py
@@ -2,6 +2,7 @@ from typing import Dict, Optional
 
 from django.db import transaction
 
+from ..core.config import config
 from ..poll.serializers import default_votes_validator
 from ..utils.auth import get_group_model
 from ..utils.autoupdate import inform_changed_data
@@ -470,7 +471,13 @@ class MotionSerializer(ModelSerializer):
             data["text"] = ""
         else:
             if "text" in data and not data["text"]:
-                raise ValidationError({"detail": "This field may not be blank."})
+                raise ValidationError({"detail": "The text field may not be blank."})
+            if (
+                "reason" in data
+                and not data["reason"]
+                and config["motions_reason_required"]
+            ):
+                raise ValidationError({"detail": "The reason field may not be blank."})
 
         return data