André Boucourechliev (28 July 1925 – 13 November 1997) was a French composer of Bulgarian origin.
His first attempts at composition date from 1954, when he was engaged in the famous contemporary music sessions at Darmstadt.
He honed his compositional technique by seeking out Berio and Maderna in Milan.
Following the success of his Piano Sonata (1959), which was performed at the Domaine musical, and works involving choice and chance, he spent a period in America, during which he met Cage, Merce Cunningham, and Rauschenberg.
The summit of his exploration of choice and freedom on the part of the performer was reached in Archipels (1967–1971).