At first a theatre actor, he worked for many years in the Comédie Française, where he started his career in 1964.

[2] Duchaussoy performed in many French classic plays including those by Molière, Marivaux, Corneille and Ionesco.

He received the prestigious Molière award for best supporting actor in 2003.

[2] The deep-voiced actor dubbed Marlon Brando in the French version of Francis Ford Coppola's The Godfather.

[2] In 2010 he co-starred with Sophie Marceau in Yann Samuell's L’age de raison.