Jean Gabin as Commissaire Jules Maigret

Françoise Fabian as Lily

Michel Constantin as Cicero

Paul Frankeur as Bonfils

Guy Decomble as l'inspecteur Lognon

Paulette Dubost as la patronne de l'hôtel

Laurence Badie as Lucienne

Marcel Bozzuffi as l'inspecteur Torrence

Vittorio Sanipoli as Pozzo

Rickie Cooper as Charlie

Roland Armontel as Docteur Fezin

Edward Meeks as Bill Larner

Paul Carpenter as Harry Mc Donald

Roger Dutoit as Bidoine

Carlo Nell as Le garçon du 'Manhattan'

Charles Bouillaud as Le pharmacien Dullac

André Dalibert as Un inspecteur

Harry-Max as Curtis

Jean-Louis Le Goff as Un inspecteur

Jacques Dynam as Un inspecteur

Marc Arian as L'employé des cartes grises (uncredited)

Marcel Bernier as Un inspecteur (uncredited)

Jacques Bertrand as Un inspecteur (uncredited)

Édouard Francomme as Un consommateur (uncredited)

Marcel Gassouk as Riquet (uncredited)

Georges Guéret as Un inspecteur (uncredited)

Henri Lambert as L'inspecteur Groussard (uncredited)

Roland Malet as Un agent (uncredited)

Albert Michel as Le concierge de l'hôtel

Jean Minisini as Un inspecteur (uncredited)

Paul Pavel as Un inspecteur (uncredited)

Raymond Pierson as Un agent du commissariat (uncredited)

Jean-Jacques Steen as (uncredited)

Pierre Vernet as (uncredited)

Louis Viret as Le patron du café (uncredited)