Pierrot le Fou (pronounced [pjɛʁo lə fu], French for "Pierrot the Fool") is a 1965 French New Wave romantic crime drama road film written and directed by Jean-Luc Godard, starring Jean-Paul Belmondo and Anna Karina. The film is based on the 1962 novel Obsession by Lionel White. It was Godard's tenth feature film, released between Alphaville and Masculin, féminin. The plot follows Ferdinand, an unhappily married man, as he escapes his boring society and travels from Paris to the Mediterranean Sea with Marianne, a young woman chased by OAS hitmen from Algeria.

It was the 15th-highest grossing film of the year, with a total of 1,310,580 admissions in France. The film was selected as the French entry for the Best Foreign Language Film at the 38th Academy Awards, but was not accepted as a nominee. It received critical acclaim with praise towards the film's narrative style, Belmondo's and Karina's performances, Godard's direction and the cinematography.