The Brain is a 1969 French comedy film directed by Gérard Oury, about a second train robbery by the brain behind the Great Train Robbery of 1963. It stars Jean-Paul Belmondo and Bourvil as a pair of French petty crooks, David Niven as a British Army officer who is secretly a criminal mastermind and Eli Wallach as a Sicilian mafioso.

Gérard Oury was a French film director, actor and writer.