Peppermint Soda (French: Diabolo menthe) is a 1977 French coming-of-age comedy-drama film co-written and directed by Diane Kurys. This autobiographical film was her directorial debut, and it won the Louis Delluc Prize at the 1977 Cannes Film Festival.

The film follows two teenage sisters over the course of the years 1963 and 1964, with the title referring to a grown-up carbonated beverage that the younger sister drinks in a café. The high school where the film takes place is the Lycée Jules-Ferry in Paris. The film is partly based on director Kurys's experiences and opens with a title card that states; "For my sister—who still hasn't given me back my orange sweater."