Step 1: Open Facebook Messenger and click on the three lines in the top left corner. Step 2: Scroll down and select “Settings.” Step 3: Scroll down and select “Clear History.” Step 4: A pop-up will appear asking if you are sure you want to clear history. Select “Clear.” Step 5:
Video – How To Delete All Messages In Facebook Messenger
That’s it! You have now learned how to delete all messages in Facebook Messenger.