diff --git a/aiogram/types/message.py b/aiogram/types/message.py
index 058a508b..9ff020f4 100644
--- a/aiogram/types/message.py
+++ b/aiogram/types/message.py
@@ -101,7 +101,7 @@ class Message(base.TelegramObject):
         if self.new_chat_members:
             return ContentType.NEW_CHAT_MEMBERS[0]
         if self.left_chat_member:
-            return ContentType.LEFT_CHAT_MEMBER
+            return ContentType.LEFT_CHAT_MEMBER[0]
         if self.invoice:
             return ContentType.INVOICE[0]
         if self.successful_payment:
@@ -676,7 +676,7 @@ class ContentType(helper.Helper):
     LOCATION = helper.ListItem()  # location
     VENUE = helper.ListItem()  # venue
     NEW_CHAT_MEMBERS = helper.ListItem()  # new_chat_member
-    LEFT_CHAT_MEMBER = helper.Item()  # left_chat_member
+    LEFT_CHAT_MEMBER = helper.ListItem()  # left_chat_member
     INVOICE = helper.ListItem()  # invoice
     SUCCESSFUL_PAYMENT = helper.ListItem()  # successful_payment