The Coffin Affair (French: L'Affaire Coffin) is a Canadian drama film from Quebec, released in 1980. Directed by Jean-Claude Labrecque, the film is a dramatization of the Coffin affair of 1953.

The film stars August Schellenberg as Wilbert Coffin. The cast also includes Gabriel Arcand, Micheline Lanctôt, Roger Lebel, Aubert Pallascio, Yvon Dufour and Raymond Cloutier.

The film reignited the controversy over Coffin's conviction and execution. Jules Deschênes, the Quebec Superior Court judge who had presided over the 1964 inquiry into Coffin's conviction, publicly claimed that the filmmakers "twisted the facts to accommodate their personal convictions and thus present a slanderous portrait of the judicial system to the viewing public"; Jacques Hébert, the journalist who had initiated the original controversy with his 1963 book J'accuse les assassins de Coffin and had been a consultant on the film, responded with an open letter in La Presse in response to Deschênes' allegations.