Pierre Brasseur
— Maître Pierre Renneville
Monique Mélinand
— Denise Lamarche
François Patrice
— Jacques
Sophie Leclair
— Gisèle
Henri Nassiet
— Doctor Marignan
Alfred Adam
— Georges Lamarche
Jacqueline Porel
— Lucienne Marignan
Odette Laure
— Madame Berthelin
Albert Duvaleix
— President
Marie-France
— Nicole
Michel Etcheverry
— General Counsel
Lucienne Le Marchand
— Madame Lamarche mother
Charles Bouillaud
— Substitute Barillier
Pauline Carton
— Mademoisellle Michel aka 'La Punaise'
Alice Tissot
— Madame Pitois aka 'La Pimbêche'
André Gabriello
— Berthelin
Marcelle Arnold
— Madame Fournier (uncredited)
Henri Coutet
— A man (uncredited)
Paul Demange
— A regular (uncredited)
Cécile Didier
— Hortense (uncredited)
Jean Lanier
— Professor (uncredited)
Bernard Musson
— A man (uncredited)
Roger Vincent
— Medical Examiner (uncredited)