Joseph Losey	...	(Director)
Franco Solinas, Fernando Morandi	...	(Writer)
Alain Delon	...	Mr. Robert Klein
Jeanne Moreau	...	Florence Klein
Francine Bergé	...	Nicole (as Francine Berge)
Juliet Berto	...	Jeanine
Jean Bouise	...	Le vendeur
Suzanne Flon	...	La concierge
Massimo Girotti	...	Charles
Michael Lonsdale	...	Pierre (as Michel Lonsdale)
Michel Aumont	...	Le fonctionnaire de la préfecture
Roland Bertin	...	L'administrateur du journal
Jean Champion	...	Le gardien de la morgue
Etienne Chicot	...	Un policier
Magali Clément	...	Lola (as Magali Clement)
Gérard Jugnot	...	Le photographe
Hermine Karagheuz	...	La jeune ouvrière
Elisabeth Kaza	...
Dany Kogan	...	Michelle
Carole Lange	...
Lucienne Le Marchand	...	(as Lucienne Lemarchand)
Jacques Maury	...	Le professeur Montandon
Fred Personne	...	Le commissaire
Francine Racette	...	Françoise / Cathy
Rosine Rochette	...
Isabelle Sadoyan	...	La femme à la consultation
Louis Seigner	...	Le père de Robert Klein
Maurice Vallier	...
Pierre Vernier	...	Un policier
François Viaur	...
Brigitte Ariel	...	(uncredited)
Marius Balbinot	...	(uncredited)
Maurice Baquet	...	Un musicien (uncredited)
Philippe Brizard	...	(uncredited)
Jenny Cleve	...	(uncredited)
Raymond Danon	...	(uncredited)
Alain David	...	Le groom (uncredited)
Michel Delahaye	...	(uncredited)
Christian de Tillière	...	Le commissaire-priseur (uncredited)
Bernard-Pierre Donnadieu	...	Extra (uncredited)
Pierre Frag	...	Le marchand de journaux (uncredited)
Mireille Franchino	...	(uncredited)
Maurice Jany	...	Le chauffeur à Ivry-Bataille (uncredited)
Joseph Losey	...	Man in Vel d'Hiv (uncredited)
Stephane Quatrehomme	...	Le fils de Pierre (uncredited)
Jean Topart	...	La voix du speaker (voice) (uncredited)
Claude Valmont	...	(uncredited)
Gerry Fisher	...	Cinematographer
Marie Castro-Vasquez	...	Film Editor
Henri Lanoë	...	Film Editor
Michèle Neny	...	Film Editor
Maurice Dagonneau	...	Sound Department
Jean LabussiËre	...	Sound Department
Alex Pront	...	Sound Department
Federico Savina	...	Sound Department
Egisto Macchi	...	Composer
Pierre Porte	...	Composer
Alexandre Trauner	...	Art Director
Pierre Charron	...	Set Decorator
Gerard James	...	Set Decorator
Colette Baudot	...	Custome Designer
Annalisa Nasalli-Rocca	...	Custome Designer
Françoise Andrejka	...	Makeup Artist
Michel Deruelle	...	Makeup Artist
Pierre Vadé	...	hair stylist
Philippe Baronnet-Fruges	...	Assistant Director
Rémy Duchemin	...	Assistant Director
Philippe Monnier	...	Assistant Director
Henri Berger	...	props
Pierre Duquesne	...	Set Designer
Olivier Girard	...	Set Designer
Michel Suné	...	props

Summary: Paris, 1942. Robert Klein cannot find any fault with the state of affairs in German-occupied France. He has a well-furnished flat, a mistress, and business is booming. Jews facing discrimination because of laws edicted by the French government are desperate to sell valuable works of art - and it is easy for him to get them at bargain prices. His cosy life is disrupted when he realizes that there is another Robert Klein in Paris - a Jew with a rather mysterious behaviour. Very soon, this homonymy attracts the close - and menacing - attention of the police on the established art trader.