Léo Chauliac, né Léon Chauliac (6 February 1913 – 27 October 1977), was a French jazz pianist, composer and conductor.

A jazz pianist in the 1930s, Léo Chauliac was the accompanist of Charles Trenet from 1941 to 1943, a singer for whom he composed many popular songs. He rubbed shoulders and played with the greatest musicians of the time: Hubert Rostaing, Aimé Barelli, Alix Combelle and Henri Crolla. For a while, as conductor of the orchestra of the famous restaurant Maxim's, he will be the companion for some records by André Claveau and Jacqueline Danno. But it was above all with Jean-Claude Pascal that he wove a long musical career in the 1960s, orchestrating among other things Nous les amoureux, winner of the 1961 Eurovision Song Contest.