Mr. Vampire IV, also known as Mr. Vampire Saga Four is a 1988 Hong Kong comedy horror film directed by Ricky Lau and produced by Sammo Hung and Jessica Chan. The film is the fourth of a series of five films directed by Ricky Lau in the Mr. Vampire franchise. Mr. Vampire and its sequels were released as part of the jiangshi cinematic boom in Hong Kong during the 1980s. The Chinese title of the film literally translates to Uncle Vampire.

Samuel "Sammo" Hung Kam-bo is a Hong Kong actor, martial artist, film producer and director, known for his work in martial arts films, Hong Kong action cinema, and as a fight choreographer for other actors such as Jackie Chan.