L'Avventura (English: "The Adventure") is a 1960 Italian drama film directed by Michelangelo Antonioni. Developed from a story by Antonioni with co-writers Elio Bartolini and Tonino Guerra, the film is about the disappearance of a young woman (Lea Massari) during a boating trip in the Mediterranean, and the subsequent search for her by her lover (Gabriele Ferzetti) and her best friend (Monica Vitti). It was filmed on location in Rome, the Aeolian Islands, and Sicily in 1959 under difficult financial and physical conditions. The film is noted for its unusual pacing, which emphasizes visual composition, mood, and character over traditional narrative development.

L'Avventura was nominated for numerous awards and was awarded the Jury Prize at the 1960 Cannes Film Festival. The film made Monica Vitti an international star. According to an Antonioni obituary, the film "systematically subverted the filmic codes, practices and structures in currency at its time". L'Avventura is the first film of a trilogy by Antonioni, followed by La Notte (1961) and L'Eclisse (1962). It has appeared on Sight & Sound's list of the critics' top ten greatest films ever made three times in a row: It was voted second in 1962, fifth in 1972 and seventh in 1982. In 2010, it was ranked #40 in Empire magazine's "The 100 Best Films of World Cinema". The film would go on to influence several arthouse directors, including Apichatpong Weerasethakul, Jia Zhangke, and Hirokazu Kore-eda.