diff --git a/app/vision/page.tsx b/app/vision/page.tsx
index 5aede7d..7791356 100644
--- a/app/vision/page.tsx
+++ b/app/vision/page.tsx
@@ -37,6 +37,17 @@ interface Mission {
   id: string;
   name: string;
   logoUrl?: string | null;
+  creator?: {
+    id: string;
+  };
+  creatorId?: string;
+  missionUsers?: Array<{
+    userId: string;
+    role: string;
+    user?: {
+      id: string;
+    };
+  }>;
 }
 
 interface ScheduledMeeting {
@@ -319,6 +330,25 @@ export default function VisionPage() {
     });
   };
 
+  // Check if user can plan a meeting for a mission
+  const canPlanMeetingForMission = (mission: Mission): boolean => {
+    if (!session?.user?.id) return false;
+    const userId = session.user.id;
+
+    // Check if user is the creator
+    if (mission.creatorId === userId || mission.creator?.id === userId) {
+      return true;
+    }
+
+    // Check if user has one of the guardian roles
+    const guardianRoles = ['gardien-temps', 'gardien-parole', 'gardien-memoire'];
+    const hasGuardianRole = mission.missionUsers?.some(
+      (mu) => (mu.userId === userId || mu.user?.id === userId) && guardianRoles.includes(mu.role)
+    );
+
+    return !!hasGuardianRole;
+  };
+
   // Helper function to format date as YYYY-MM-DD in local timezone
   const formatDateLocal = (date: Date): string => {
     const year = date.getFullYear();
@@ -988,19 +1018,21 @@ export default function VisionPage() {
                             Réunion
                           </Button>
                         )}
-                        <Button
-                          variant="outline"
-                          size="sm"
-                          className="flex items-center gap-2"
-                          onClick={(e) => {
-                            e.stopPropagation();
-                            setSelectedDate(new Date());
-                            handleOpenMeetingDialog("mission", mission.id, mission.name);
-                          }}
-                          title="Planifier une réunion"
-                        >
-                          <Calendar className="h-4 w-4" />
-                        </Button>
+                        {canPlanMeetingForMission(mission) && (
+                          <Button
+                            variant="outline"
+                            size="sm"
+                            className="flex items-center gap-2"
+                            onClick={(e) => {
+                              e.stopPropagation();
+                              setSelectedDate(new Date());
+                              handleOpenMeetingDialog("mission", mission.id, mission.name);
+                            }}
+                            title="Planifier une réunion"
+                          >
+                            <Calendar className="h-4 w-4" />
+                          </Button>
+                        )}
                       </div>
                     </div>
                   </div>