Jean-Paul Belmondo as Michel Thibault

Jeanne Moreau as Cathy / Mme Volney

Claude Brasseur as Charlie Meyer

Jean-Pierre Marielle as Paul Reynaldo

Gert Fröbe as Raymond Lachard

Alain Cuny as Hervé Bontemps

Paulette Dubost as Germaine Bontemps

Henri Poirier as Antoine

Bob Morel as un truand

Charles Regnier as le vrai Bontemps