How do I delete a conversation on Facebook?
This is about using messages on Facebook. For help with the Messenger app or messenger.com, visit the Messenger Help Center.
To delete a conversation from Facebook:
  1. Click at the top of the page.
  2. Open the conversation you want to delete.
  3. Click Options at the top of the chat window and click Delete Conversation > Delete Conversation.
You can also delete a conversation from your messages inbox:
  1. Go to your messages inbox by clicking Messenger in the top left of Facebook.
  2. Open the conversation you want to delete.
  3. Hover over the conversation you'd like to delete and click .
  4. Select Delete > Delete.
Note: Once you choose to delete a conversation, this can't be undone.
Keep in mind that deleting a conversation from your inbox won't delete it from your friend's inbox.
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