Jean-Paul Belmondo as Rocco

Lino Ventura as Hervé Marec, aka 'Le plouc'

Bernard Blier as Mitch-Mitch

Andréa Parisy as Pepa

Gert Fröbe as Castigliano, aka 'La betterave'

Reginald Kernan as John Steiner aka Peter Frocht

Pierre Mirat as Halibi, aka 'Le sourdingue'

Doudou Babet as Khenouche, waiter at Halibi

Jackie Blanchot as Guest at Halibi

Anne-Marie Coffinet as Angèle Bameste

Pierre Collet as Worker at Castigliano

Louis Bugette as Orlando, bar owner

Christian Brocard as Plouc's Mechanic

Paul Bonifas as Doctor Magnart, former professor in Lyon

Henri Lambert as Robert, client at Orlando (uncredited)

Marcel Bernier as Marcel, mechanic at Castigliano (uncredited)

Georges Aminel as Castigliano, aka 'La betterave' (voice) (uncredited)