Sadma (transl. Trauma) is a 1983 Indian Hindi-language tragedy romantic drama film, written and directed by Balu Mahendra. It stars Kamal Haasan and Sridevi in lead roles, with the music composed by Ilaiyaraaja. The film tells the story of Nehalata Malhotra, a young woman who regresses to childhood as result of retrograde amnesia after suffering a head injury in a car crash. She was lost, and ended up trapped in a brothel before being rescued by Somu, a lonely school teacher who falls in love with her. The film was released on 8 July 1983.

The film was a remake of Mahendra's own 1982 Tamil film Moondram Pirai, which also starred Kamal and Sridevi. Sadma was widely acclaimed by critics for its direction, screenplay, music and performances. Sridevi's performance as an amnesiac woman was widely praised. Although a commercial failure upon release, Sadma over the years has gained cult status.

At the 31st Filmfare Awards, Sadma received three nominations: Best Actor (Kamal Haasan) Best Actress (Sridevi) and Best Story (Mahendra).