Alain Delon

Mr. Robert Klein

Jeanne Moreau

Florence Klein

Francine Bergé

Nicole

Juliet Berto

Jeanine

Jean Bouise

Seller

Suzanne Flon

Doorwoman

Massimo Girotti

Charles

Michael Lonsdale

Pierre

Michel Aumont

Jew Affairs Section Official

Roland Bertin

Newspaper Director

Jean Champion

Diener

Etienne Chicot

Policeman

Gérard Jugnot

Photographer

Hermine Karagheuz

Young Worker

Jacques Maury

Professor Montandon

Fred Personne

Police Commissioner

Francine Racette

Françoise / Cathy / Isabelle

Isabelle Sadoyan

Examined Woman

Louis Seigner

Mr. Klein's Father

Elisabeth Kaza

Carole Achache

Lucienne Le Marchand

Rosine Rochette

Maurice Vallier

Pierre Vernier

Policeman

François Viaur

Joseph Losey

Un Homme au Vel d'Hiv (uncredited)

Brigitte Ariel

(uncredited)

Maurice Baquet

Un Musicien (uncredited)

Philippe Brizard

(uncredited)

Jenny Clève

(uncredited)

Raymond Danon

(uncredited)

Christian de Tillière

Le Commissaire-Priseur (uncredited)

Michel Delahaye

(uncredited)

Bernard-Pierre Donnadieu

Extra (uncredited)

Pierre Frag

Le Marchand de Journaux (uncredited)

Mireille Franchino

(uncredited)

David Gabison

Le Groom (uncredited)

Jean Topart

La Voix du Speaker (voice) (uncredited)

Dany Kogan

Michelle

Thierry de Brem