Albert Préjean as Maigret

Juliette Faber as Berthe

Jean Tissier as Mascouvin

André Gabriello as Lucas

Noël Roquevert as Louis Dubief

Guillaume de Sax as Maître Laignan

Édouard Delmont as Le Cloaguen

Antoine Balpêtré as Le grand patron

Henri Vilbert as Amadieu

Pierre Palau as Le docteur Pierre

Gabrielle Fontan as La soeur de Le Cloaguen

Colette Régis as Madame Le Cloaguen

Jean-Marie Boyer as Le petit employé (uncredited)

Albert Brouett as (uncredited)

Henri Charrett as (uncredited)

Raymond Dardelin as (uncredited)

Jean Dasté as Le clerc (uncredited)

Jean Daurand as Le coursier (uncredited)

France Delahalle as (uncredited)

Jacques Denoël as Jacques (uncredited)

Marguerite Ducouret as Madame Cognet (uncredited)

Marcel Duhamel as Le peintre (uncredited)

Pierre Ferval as (uncredited)

Fabienne Fortaire as (uncredited)

Édouard Francomme as (uncredited)

Georges Gosset as (uncredited)

Héléna Manson as Marie, la bonne (uncredited)

Maurice Marceau as Un inspecteur (uncredited)

Frédéric Mariotti as Le garçon du buffet (uncredited)

Maximilienne as Madame Bertaud (uncredited)

Marcelle Rexiane as La patronne de l'hôtel (uncredited)

André Varennes as Bouffartigues (uncredited)

Huguette Vivier as Eliane (uncredited)

Janine Viénot as La concierge de Jeanne Dumont (uncredited)