Cheating in bridge refers to a deliberate violation of the rules of the game of bridge or other unethical behaviour that is intended to give an unfair advantage to a player or team. Cheating can occur in many forms and can take place before, during, or after a board or game.

Commonly cited instances of cheating include: conveying information to a partner by means of a pre-arranged illegal signal, viewing the opponents' cards in a board prior to