Alfred Éric Leslie Satie (Honfleur, 17 May 1866 – Paris, 1 July 1925) was a French composer, pianist, and writer.

Over the years, Erik Satie would be described as a precursor of movements and styles as varied as impressionism, neo-classicism, dada, surrealism, conceptual art, minimalism and ambient music. As taking the first steps towards techniques such as prepared piano and music-to-film synchronisation, Satie became one of the first musicians to perform a cameo appearance in the 1924 film, Entr'acte, by the French filmmaker René Clair.

Satie appears to have been the avant-garde to half of the avant-garde movements of the 20th century. He was in contact with Tristan Tzara, the initiator of the Dada movement. He got to know the other Dadaists, such as Francis Picabia (later to become a Surrealist), André Derain, Marcel Duchamp and Man Ray.

Satie contributed to the Dadaist publication 391. In the first months of 1922, he was surprised to find himself entangled in the argument between Tzara and André Breton. Satie originally sides with Tzara, but manages to maintain friendly relations with most players in both camps.

Eccentric yet visionary French composer, Erik Satie is today regarded as a key modernist composer. As well as influencing contemporaries such as Claude Debussy, who orchestrated some of his piano works, and Maurice Ravel, his tendency towards simplicity and repetition continue to inform modern avant-garde genres.