Lino Ventura as Alphonse Maréchal aka 'Le Malin'

Charles Aznavour as Edmond Clancul aka 'Le Naïf'

Irina Demick as Catherine Verdier, manager of an art gallery

Maurice Biraud as Arthur aka 'Le Mou'

Georges Géret as Joseph Rouquemoute aka 'Le Rouquin'

Pierre Brasseur as Demuldère aka 'Tonton le Brocanteur', receiver

Françoise Rosay as Gertrude, supplies specialist in the mafia

Annie Fratellini as Léone Rouqemoute, prostitute

Norman Bart as Gallery visitor

Georges Blaness as Omar

Dorothée Blanck as Girl at the hotel particulier

Marcel Charvey as Gallery visitor

François Dalou as Police inspector

Michel Dacquin as Nightclub bartender

Marie-Hélène Dasté as Madame Clancul

Michel Duplaix as Head waiter

Michel Garland as Gallery visitor

Jacques Marchand as Gallery visitor

François Mirante as Police inspector

Donald O'Brien as Gallery visitor

Renée Passeur as Friend of Léone

André Thorent as Gangster client of the cabaret

Patricia Scott as Elisabeth

François Valorbe as Employee of the employment agency

Daniel Ceccaldi as Police inspector Lescure

Georges Chamarat as Edmond Clancul

Jean-Pierre Caussade as

Marc Arian as Demuldère's servant (uncredited)

Arlette Balkis as Worshiper of the oriental god (uncredited)

Jean Carmet as Effeminate art critic (uncredited)

Marcel Bernier as Friend of Alphonse (uncredited)

Albert Daumergue as Extra (uncredited)

Agnès Duval as (uncredited)

Marius Gaidon as Extra (uncredited)

Guy Henry as (uncredited)

Roger Lecuyer as Passerby looking in the shop window (uncredited)

Laure Paillette as Woman at the window (uncredited)

Paul Pavel as Cabaret customer (uncredited)

Émile Riandreys as Employee of the employment agency (uncredited)

André Rouyer as Cabaret customer (uncredited)

Dominique Zardi as Prisoner (uncredited)