Jules Berry
— Frédéric Octave Pancrace Truche
Denise Grey
— Isabelle Truche
Marcel André
— Inspector Paulot
Pauline Carton
— Madame Crépin, Claire's concierge
Jeanne Fusier-Gir
— Mélanie, the maid
Marcelle Géniat
— Claire's grandmother
René Génin
— The gravedigger
Marcel Mouloudji
— Bernard
Michèle Philippe
— Claire Fontanier
Louis Seigner
— Maître Canard
Jean Tissier
— The inmate who shows how to fake madness
Henri Vilbert
— Inspector Lambert
Claudine Céréda
— Claudine
Raymond Cordy
— Brigadier Chapuis
Charles Dechamps
— The investigating judge
Jim Gérald
— The doctor
Maximilienne
— Madame Rabichou
Robert Pizani
— Martin
Jean Témerson
— Martin's valet
André Chanu
— The Narrator (voice)
Jacques Denoël
— The journalist
Fernand Gilbert
— The prison guard
Raymond Girard
Laugier
Frédéric Mariotti
— The guardian
Georges Pally
— The chauffeur
Jean Berton
— The Police Officer (uncredited)
Campion
— (uncredited)
Yvonne Dany
— (uncredited)
Roger Krebs
— (uncredited)