Betrayal is a 1983 film adaptation of Harold Pinter's 1978 play of the same name. With a semi-autobiographical screenplay by Pinter, the film was produced by Sam Spiegel and directed by David Jones. It was critically well received, praised notably by New York Times film critic Vincent Canby and by Chicago Sun-Times film critic Roger Ebert. Distributed by 20th Century Fox International Classics (USA), it was first screened in movie theaters in New York in February 1983.

Betrayal follows significant moments in the seven-year extramarital affair of art gallery owner Emma (Patricia Hodge) with literary agent Jerry (Jeremy Irons), the best friend of her husband Robert (Ben Kingsley), a London publisher. With titles such as "Two years earlier" and "Three years earlier," nine sequences are shown in reverse chronological order with Emma and Jerry meeting for the first time at the conclusion of the film.

Pinter based the drama on his seven-year (1962-69) clandestine affair with television presenter Joan Bakewell, who was married to producer-director Michael Bakewell. At the time, Pinter was married to actress Vivien Merchant.