diff --git a/src/kawaz/apps/events/perms.py b/src/kawaz/apps/events/perms.py
index f536435f..d8d52eb7 100644
--- a/src/kawaz/apps/events/perms.py
+++ b/src/kawaz/apps/events/perms.py
@@ -16,6 +16,12 @@ class EventPermissionLogic(PermissionLogic):
     - `events.quit_event`
 
     """
+    def _change_event_perm(self, user_obj, perm, obj):
+        # non attendee cannot change the event
+        if not obj.attendees.filter(pk=user_obj.pk):
+            return False
+        return True
+
     def _has_attend_perm(self, user_obj, perm, obj):
         # duplicated attendance is not permitted
         if obj.attendees.filter(pk=user_obj.pk):
@@ -73,7 +79,7 @@ def author_required(user_obj, perm, obj):
             return obj.organizer == user_obj
         # object permission
         permission_methods = {
-            'events.change_event': author_required,
+            'events.change_event': self._change_event_perm,
             'events.delete_event': author_required,
             'events.attend_event': self._has_attend_perm,
             'events.quit_event': self._has_quit_perm,
diff --git a/src/kawaz/apps/events/tests/test_perms.py b/src/kawaz/apps/events/tests/test_perms.py
index 58c1ca10..8ad08938 100644
--- a/src/kawaz/apps/events/tests/test_perms.py
+++ b/src/kawaz/apps/events/tests/test_perms.py
@@ -67,6 +67,7 @@ def test_change_permission_with_obj(self):
         self._test('wille', 'change', obj=self.event, neg=True)
         self._test('anonymous', 'change', obj=self.event, neg=True)
         self._test('organizer', 'change', obj=self.event)
+        self._test('attendee', 'change', obj=self.event)
 
     def test_delete_permission_without_obj(self):
         """
@@ -92,6 +93,7 @@ def test_delete_permission_with_obj(self):
         self._test('wille', 'delete', obj=self.event, neg=True)
         self._test('anonymous', 'delete', obj=self.event, neg=True)
         self._test('organizer', 'delete', obj=self.event)
+        self._test('attendee', 'delete', obj=self.event, neg=True)
 
     def test_attend_permission_without_obj(self):
         """