François Périer

as Paul, le directeur de la prison

Peter van Eyck

as Cyril Gad

Anouk Aimée

as Isabelle

Darío Moreno

as Luigi Falconi

André Versini

as Antoine 'Tony' Lefébure

Jean-Pierre Marielle

as Lucien, le détenu bavard

Jean-Claude Brialy

as Un inspecteur de police

Eleonora Rossi Drago

as Odette, la femme du directeur

Pierre Mondy

as Émile Chanu

Michèle Drey

Gérard Dorsen

Mario David

as Paulo, un détenu

Albert Michel

as Le gardien-brigadier Bricart

Olivier Darrieux

as Un gardien

Henri Riou

Louis Lalanne

Charles Gérard

as Un détenu

André Chanu

Louis Viret

as Le patron du bistrot qui chante la romance

André Jocelyn

as Le banquier

Pierre-Louis

as Gaston Berlioux, un complice de Gad

Pierre Dudan

as Fernand

Francis Blanche

as La Bonbonne

Franco Fabrizi

as Karl Herman

Marius David

as (uncredited)

Van Doude

as (uncredited)

Michel Isella

as (uncredited)