How to Delete Messages From Facebook Messenger
When seeking to clear your chat history on Facebook or Messenger, you must make a decision between one of two actions: removing a specific message or deleting the entire history of your conversations between you and another person on Facebook.
You may want to delete just one message (or a few) out of your entire history. Or you may want to clear your chat history to start a new conversation without the distraction of old text hovering above, or to hide the information from potentially prying eyes.
In either case, we'll show you what steps to take depending on whether you're working on a computer or a mobile device like your phone or tablet.
One warning in advance, however: unlike some messaging apps, deleting Facebook messages or clearing your history does not remove the message from other people's history. If you've sent an embarrassing message to a friend and deleted that message from your chat history, your friend still has a copy. The best bet is to never say anything via a message — or anywhere online — that you would not want as part of the permanent record.
Tip: If you're deleting Facebook messages to clear out the conversation list, keep in mind that you can always use the archive feature for that. That way, the messages won't be permanently removed, but they will be cleared away from the main list of conversations.