diff --git a/apps/activity/models.py b/apps/activity/models.py
index c7c92e8d..4e313a57 100644
--- a/apps/activity/models.py
+++ b/apps/activity/models.py
@@ -234,7 +234,7 @@ class Guest(models.Model):
     """
     activity = models.ForeignKey(
         Activity,
-        on_delete=models.PROTECT,
+        on_delete=models.CASCADE,
         related_name='+',
     )
 
diff --git a/apps/activity/templates/activity/activity_detail.html b/apps/activity/templates/activity/activity_detail.html
index a94d1e37..077acb29 100644
--- a/apps/activity/templates/activity/activity_detail.html
+++ b/apps/activity/templates/activity/activity_detail.html
@@ -95,5 +95,23 @@ SPDX-License-Identifier: GPL-3.0-or-later
             errMsg(xhr.responseJSON);
         });
     });
+    $("#delete_activity").click(function () {
+        if (!confirm("{% trans 'Are you sure you want to delete this activity?' %}")) {
+            return;
+        }
+
+        $.ajax({
+            url: "/api/activity/activity/{{ activity.pk }}/",
+            type: "DELETE",
+            headers: {
+                "X-CSRFTOKEN": CSRF_TOKEN
+            }
+        }).done(function () {
+            addMsg("{% trans 'Activity deleted' %}", "success");
+            window.location.href = "/activity/";  // Redirige vers la liste des activités (à adapter)
+        }).fail(function (xhr) {
+            errMsg(xhr.responseJSON);
+        });
+    });
 </script>
 {% endblock %}
diff --git a/apps/activity/templates/activity/includes/activity_info.html b/apps/activity/templates/activity/includes/activity_info.html
index a16ad33b..f9ea634b 100644
--- a/apps/activity/templates/activity/includes/activity_info.html
+++ b/apps/activity/templates/activity/includes/activity_info.html
@@ -70,7 +70,10 @@ SPDX-License-Identifier: GPL-3.0-or-later
             {% if ".change_"|has_perm:activity %}
                 <a class="btn btn-primary btn-sm my-1" href="{% url 'activity:activity_update' pk=activity.pk %}" data-turbolinks="false"> {% trans "edit"|capfirst %}</a>
             {% endif %}
-            {% if activity.activity_type.can_invite and not activity_started %}
+            {% if not activity.valid and ".delete_"|has_perm:activity %}
+                <a class="btn btn-danger btn-sm my-1" id="delete_activity"> {% trans "delete"|capfirst %} </a>
+            {% endif %}
+            {% if activity.activity_type.can_invite and not activity_started and activity.valid %}
                 <a class="btn btn-primary btn-sm my-1" href="{% url 'activity:activity_invite' pk=activity.pk %}" data-turbolinks="false"> {% trans "Invite" %}</a>
             {% endif %}
         {% endif %}
diff --git a/apps/activity/urls.py b/apps/activity/urls.py
index 962be72a..63a3a169 100644
--- a/apps/activity/urls.py
+++ b/apps/activity/urls.py
@@ -15,4 +15,5 @@ urlpatterns = [
     path('<int:pk>/update/', views.ActivityUpdateView.as_view(), name='activity_update'),
     path('new/', views.ActivityCreateView.as_view(), name='activity_create'),
     path('calendar.ics', views.CalendarView.as_view(), name='calendar_ics'),
+    path('<int:pk>/delete', views.ActivityDeleteView.as_view(), name='delete_activity'),
 ]
diff --git a/apps/activity/views.py b/apps/activity/views.py
index 80bc1506..02a98254 100644
--- a/apps/activity/views.py
+++ b/apps/activity/views.py
@@ -152,6 +152,21 @@ class ActivityUpdateView(ProtectQuerysetMixin, LoginRequiredMixin, UpdateView):
     def get_success_url(self, **kwargs):
         return reverse_lazy('activity:activity_detail', kwargs={"pk": self.kwargs["pk"]})
 
+class ActivityDeleteView(View):
+    def delete(self, request, pk):
+        try:
+            activity = Activity.objects.get(pk=pk)
+            activity.delete()
+            return JsonResponse({"message": "Activity deleted"})
+        except ProtectedError as e:
+            return JsonResponse({"error": "Cannot delete this activity because it is still referenced by guests."}, status=400)
+        except Activity.DoesNotExist:
+            return JsonResponse({"error": "Activity not found"}, status=404)
+
+    def dispatch(self, *args, **kwargs):
+        # Optionnel : restreindre à utilisateur connecté ou permissions
+        return super().dispatch(*args, **kwargs)
+
 
 class ActivityInviteView(ProtectQuerysetMixin, ProtectedCreateView):
     """