How to Delete Chat History on Line Messenger App on Android?br br Step 1: Go to 'More' tab of your Line App, and then tap on 'gear' icon at the top.br br Step 2: Tap on 'Chats' under General settings.br br Step 3: Scroll down until you find 'Delete chat history', and then tap on that.br br Step 4: Tap on 'Delete' link on the pop up.br br It's done.