A Nightmare on Elm Street 4: The Dream Master is a 1988 American fantasy slasher film directed by Renny Harlin, and is the fourth installment in the A Nightmare on Elm Street franchise. Serving as a sequel to A Nightmare on Elm Street 3: Dream Warriors (1987), the film follows Freddy Krueger (Robert Englund) who, following the death of Nancy Thompson and completing his revenge against the families who killed him, reappears in the dreams of Kristen Parker, Joey Crusel, and Roland Kincaid, where he uses Kristen's best friend, Alice Johnson, to gain access to new victims in order to satiate his murderous needs. The Dream Master is often popularly referred to as "the MTV Nightmare" of the franchise.

The Dream Master was released on August 19, 1988, and grossed $49.4 million at the domestic box office on a budget of $6.5 million, which made it the highest-grossing film in the franchise in the United States until the release of Freddy vs. Jason, a crossover with the Friday the 13th franchise, in 2003. The film received some positive reviews from critics. It was followed by A Nightmare on Elm Street 5: The Dream Child (1989).