Suspiria (Latin: [sʊsˈpiːri.a]) is a 1977 Italian supernatural horror film directed by Dario Argento, who co-wrote the screenplay with Daria Nicolodi, partially based on Thomas De Quincey's 1845 essay Suspiria de Profundis. The film stars Jessica Harper as an American ballet student who transfers to a prestigious dance academy in Germany but realizes, after a series of brutal murders, that the academy is a front for a supernatural conspiracy. It also features Stefania Casini, Flavio Bucci, Miguel Bosé, Alida Valli, Udo Kier and Joan Bennett, in her final film role.

The film is the first of the trilogy Argento refers to as The Three Mothers, which also comprises Inferno (1980) and The Mother of Tears (2007). Suspiria has received a positive response from critics for its visual and stylistic flair, use of vibrant colors and its score by Argento and the progressive rock band Goblin.

Suspiria was nominated for two Saturn Awards: Best Supporting Actress for Bennett in 1978, and Best DVD Classic Film Release, in 2002. It is recognised as an influential film in the horror genre. It served as the inspiration for a 2018 film of the same title, directed by Luca Guadagnino.