Satan's Slave (released in the United States as Evil Heritage) is a 1976 British supernatural horror film directed by Norman J. Warren. It was written by David McGillivray and stars Candace Glendenning, Michael Gough, Martin Potter, and Barbara Kellerman. Its plot follows a young woman who, after surviving a car accident, stays on the country estate of her uncle and cousin, unaware they are both necromancers who intend to sacrifice her to resurrect the spirit of a supernaturally-gifted ancestor.

The film, a production of Warren's newly formed company Monumental Pictures, was funded by producers Les Young and Richard Crafter with their own money and shot almost entirely on location in Pirbright and Shepherd's Bush in December 1975. The following year, re-shoots were conducted to film additional material as well as more violent alternative versions of existing scenes, with the aim of increasing the film's appeal to Far East audiences.

In the UK, Satan's Slave was originally released as a B movie. Critical reaction to the film has been mixed, with aspects such as the acting, script and plot drawing a variety of responses.