Chainsaw Man – The Movie: Reze Arc (Japanese: 劇場版 チェンソーマン レゼ篇, Hepburn: Gekijō-ban Chensō Man Reze-hen), also known simply as Chainsaw Man: Reze Arc, is a 2025 Japanese animated dark fantasy romantic action comedy film based on Tatsuki Fujimoto's manga series Chainsaw Man. Produced by MAPPA, directed by Tatsuya Yoshihara, and written by Hiroshi Seko, the film is a direct sequel to the first season of the anime television series and adapts events covered by the original manga's fifth and sixth volumes. It is storyboarded by Daisuke Tokudo, Masato Nakazono, Sōta Shigetsugu, Takuya Niinuma, Tatsuya Yoshihara and Yuzuru Tachikawa.

Chainsaw Man – The Movie: Reze Arc was released in Japan on September 19, 2025, by Toho. As of November 16, 2025, the film has grossed $168.4 million worldwide making it one of the highest-grossing Japanese films of all time and received positive reviews from critics.