Rellys
— Amédée
Robert Arnoux
— Mareuil
Julien Carette
— Ange-Louis
Jeannette Batti
— Jacqueline
Christine Hayrel
— Monique Castapoul
François Joux
— Doctor
Marcel Pérès
— Castapoul
André Bervil
— Georges
Georges Tourreil
— Inspector
Charles Lemontier
— Mr. Legros
Marcel Delaître
— Inspector
Paul Azaïs
— Photographer
Gaston Gabaroche
— Forensic pathologist
Jean Clarieux
— Étienne
René Worms
— Friend
Madeleine Gérôme
— Saleswoman
Pauline Carton
— Aunt Eugénie
Annette Poivre
— Amélie
Josée Ariel
— (uncredited)
René Lacourt
— Un ami (uncredited)
Franck Maurice
— Un ouvrier de l'institut (uncredited)
Marcel Portier
— (uncredited)
Liliane Robin
— (uncredited)
Christian Simon
— (uncredited)
Roger Vincent
— (uncredited)
Yvonne Yma
— Une invitée (uncredited)