The Sleeping Car Murders is a 1965 French mystery film directed by Costa-Gavras from the novel by Sébastien Japrisot. It stars Yves Montand, Simone Signoret, Michel Piccoli, Jean-Louis Trintignant, Catherine Allégret, Jacques Perrin, Charles Denner and Pascale Roberts. The film was the directorial debut of Costa-Gavras, to be followed later by other, more politically-oriented work.

Konstantinos "Kostas" Gavras, known professionally as Costa-Gavras, is a Greek-French film director, screenwriter, and producer who lives and works in France. He is known for political films, such as the political thriller Z (1969), which won an Academy Award for Best Foreign Language Film, and Missing (1982), for which he won the Palme d'Or and an Academy Award for Best Adapted Screenplay. Most of his films have been made in French, but six of them were made in English.