Diner (Japanese: ダイナー) is a 2019 Japanese crime film directed by Mika Ninagawa and written by Yumeaki Hirayama, based on a novel by Hirayama and a subsequent manga series by Takanori Kawai. The film stars Tina Tamashiro as Kanako, a young woman who is hired as a waitress at a restaurant owned by chef and former hitman Bombero (Tatsuya Fujiwara) that caters exclusively to professional killers.

Diner premiered at the Shanghai International Film Festival in China in June 2019, and was released in Japan on 5 July 2019.