Open Snapchat
Go to the chat with the message you want to delete
Press and hold the message
Tap Delete
Tap Delete again to confirm
To delete a conversation, press and hold the chat on the Chat screen
Tap Chat Settings or More
Tap Clear from Chat Feed
Confirm the action
To clear all chats, open your profile
Tap the Settings icon
Scroll to Privacy Controls
Tap Clear Conversations
Tap the X next to each conversation you want to remove from the chat list
To delete saved messages, press and hold the saved message
Tap Unsave in Chat
If you want to remove a message you sent, delete it as soon as possible
Deleted messages may still be visible if the other person already saved or screenshotted them