Michel Jonasz (born 21 January 1947 in Drancy, France) is a French composer-songwriter, singer and actor.

Born of Hungarian immigrant parents, Michel Jonasz left school at the age of 15 to find his way in the arts.

After working with both Vigon and The Lemons, in 1966 he created the band King Set with his friend, the guitarist Alain Goldstein.

Two radio successes made his voice and his talent for rhythm known: an original composition, Apesanteur (Weightlessness), in 1967, and Jezebel in 1968.

He had to wait until 1974 to find a large audience with two simultaneous hits ("tubes"): Dites-Moi and Super Nana.