De Sade is a 1969 American-German drama film directed by Cy Endfield and starring Keir Dullea, Senta Berger and Lilli Palmer. It is based on the life of Donatien Alphonse François, Marquis de Sade, named Louis Alphonse Donatien in the film.

Cyril Raker Endfield was an American film director, who at times also worked as a writer, theatre director, magician and inventor. Born in Scranton, Pennsylvania, he worked in the New York theatre in the late 1930s before moving to Hollywood in 1940. His film career was interrupted by the Hollywood blacklist, and he resettled in London at the end of 1951. He is particularly known for The Sound of Fury/Try and Get Me! (1950), Hell Drivers (1957) and Zulu (1964).