Alain Delon as Roch Siffredi

Riccardo Cucciolla as Volpone

Daniel Ivernel as Inspector Fanti

Reinhard Kolldehoff as Sam

Catherine Rouvel as Lola

Lionel Vitrant as Fernand

André Falcon as Inspector Cazenave

Adolfo Lastretti as Luciano

Pierre Koulak as Spada

Serge Davri as Charlie

Greg Germain as Le 'Nègre'

Marius Laurey as Inspector Teissère

Günter Meisner as Doctor

Jacques Debary as Prefect

Djelloul Beghoura as Lucien

Anton Diffring as German

Bruno Balp as Spectator of the Alcazar

Yvan Chiffre as

Günter Spörrle as Giuliano (uncredited)

Henri Attal as Guard at the Asylum (uncredited)

Roger Lumont as Boss of the Bar De La Marine (uncredited)

Marc Eyraud as Chief Medical Officer of the Asylum (uncredited)

Jacques Pisias as Man of Sam (uncredited)

Joëlle Bernard as Madam (uncredited)

Marie Marczack as Employee of the Alcazar (uncredited)

Janine Souchon as Nun at the Asylum (uncredited)

Sylvain Lévignac as Doorman (uncredited)

Philippe Castelli as Hairdresser (uncredited)

Marcel Gassouk as Card Player (uncredited)

Maurice Auzel as Policeman / Man of Sam (uncredited)

Mireille Darc as Prostitute in the Street (uncredited)

Laure Moutoussamy as Prostitute (uncredited)

Claudine Auger as Passenger on the Liner (uncredited)

Jean Abeillé as (uncredited)

Gabriella Farinon as (uncredited)