Mr. Klein

Mr. Robert Klein

Alain Delon

Florence

Jeanne Moreau

Nicole

Francine Bergé

Jeanine, Robert's mistress

Juliet Berto

Seller of the painting

Jean Bouise

Concierge of rue des Abbesses

Suzanne Flon

Charles, Florence's husband

Massimo Girotti

Pierre

Michael Lonsdale

Jew Affairs Section Official

Michel Aumont

Newspaper Director

Roland Bertin

Morgue keeper

Jean Champion

Policeman

Etienne Chicot

Lola

Magali Clément

Photographer

Gérard Jugnot

Young Worker

Hermine Karagheuz

Professor Montandon

Jacques Maury

Police Commissioner

Fred Personne

Françoise / Cathy / Isabelle

Francine Racette

Examined Woman

Isabelle Sadoyan

Mr. Klein's Father

Louis Seigner

Elisabeth Kaza

Carole Achache

Lucienne Le Marchand

Rosine Rochette

Maurice Vallier

Policeman

Pierre Vernier

François Viaur

Man at the Vel d'Hiv (uncredited)

Joseph Losey

(uncredited)

Brigitte Ariel

(uncredited)

Marius Balbinot

Musician (uncredited)

Maurice Baquet

(uncredited)

Philippe Brizard

(uncredited)

Jenny Clève

(uncredited)

Raymond Danon

Auctioneer (uncredited)

Christian de Tillière

(uncredited)

Michel Delahaye

Extra (uncredited)

Bernard-Pierre Donnadieu

Georges, Newspaper Seller (uncredited)

Pierre Frag

(uncredited)

Mireille Franchino

Bellboy (uncredited)

David Gabison

Driver in Ivry-la-Bataille (uncredited)

Maurice Jany

Pierre's Son (uncredited)

Stephane Quatrehomme

Speaker's voice (voice) (uncredited)

Jean Topart

Deportee (uncredited)

Danielle Verne

Michelle

Dany Kogan

(uncredited)

Thierry de Brem

Spectator (uncredited)

Tina Aumont

Little girl at the Vel d'Hiv (uncredited)

Nathalie Rigaux