diff --git a/matrix_appservice_kakaotalk/commands/kakaotalk.py b/matrix_appservice_kakaotalk/commands/kakaotalk.py
index 31b498e..c2d7b44 100644
--- a/matrix_appservice_kakaotalk/commands/kakaotalk.py
+++ b/matrix_appservice_kakaotalk/commands/kakaotalk.py
@@ -311,5 +311,4 @@ async def leave(evt: CommandEvent) -> None:
         await evt.reply("This command may only be used in a KakaoTalk channel portal room")
         return
     await evt.mark_read()
-    await evt.sender.client.leave_channel(evt.portal.channel_props)
-    await evt.sender.on_channel_left(evt.portal.ktid, evt.portal.kt_type)
+    await evt.portal.leave_kakaotalk_channel()
diff --git a/matrix_appservice_kakaotalk/portal.py b/matrix_appservice_kakaotalk/portal.py
index 0b6d6aa..ced6dee 100644
--- a/matrix_appservice_kakaotalk/portal.py
+++ b/matrix_appservice_kakaotalk/portal.py
@@ -1386,6 +1386,10 @@ class Portal(DBPortal, BasePortal):
         else:
             self.log.debug(f"{user.mxid} left portal to {self.ktid}")
 
+    async def leave_kakaotalk_channel(self, user: u.User) -> None:
+        await user.client.leave_channel(self.channel_props)
+        await user.on_channel_left(self.ktid, self.kt_type)
+
     # endregion
     # region KakaoTalk event handling