| Person | Type | Job | Role(s) |
|---|---|---|---|
 Georges Leblond | Crew | Sound | Sound |
 Georges Simenon | Crew | Writing | Novel |
Guy de Gastyne | Crew | Art | Production Design |
 Jean-Paul Le Chanois | Crew | Writing | Adaptation |
 Maurice Tourneur | Crew | Directing | Director |
 Michel Duran | Crew | Writing | Dialogue |
Pierre Montazel | Crew | Camera | Director of Photography |
Roger Dumas | Crew | Sound | Original Music Composer |
Gérard Bensdorp | Crew | Editing | Editor |
 Albert Préjean | Cast | Actor | Le commissaire Maigret |
 André Gabriello | Cast | Actor | Lucas (as Gabriello) |
 André Reybaz | Cast | Actor | Gérard Pardon |
 Charles Blavette | Cast | Actor | Monfils |
Charles Camus | Cast | Actor | Léopold (uncredited) |
Charles Lavialle | Cast | Actor | Le raccommodeur de faïence (uncredited) |
 France Asselin | Cast | Actress | Hélène Pardon (uncredited) |
 Geneviève Morel | Cast | Actress | Une amie de Madame Petiot (uncredited) |
Georges Gosset | Cast | L'homme au tandem (uncredited) | |
 Germaine Kerjean | Cast | Actress | Madame Boynet |
 Gustave Gallet | Cast | Actor | Le médecin (uncredited) |
 Henri Vilbert | Cast | Actor | Un inspecteur (uncredited) |
 Henry Bonvallet | Cast | Actor | Le juge d'instruction (as Henri Bonvalet) |
Jacques Beauvais | Cast | Actor | Monsieur Paul (uncredited) |
 Jean Brochard | Cast | Actor | Dandurand |
 Jean Clarieux | Cast | Actor | Voyageur dans le métro (uncredited) |
 Jean Martin | Cast | Actor | Le garçon d'étage (uncredited) |
Julienne Paroli | Cast | La femme de ménage (uncredited) | |
Liliane Maigné | Cast | Nouchi | |
 Luce Fabiole | Cast | Actress | Madame Petitot, la concierge |
 Marcel André | Cast | Actor | Le directeur de la P.J. |
Marcel Carpentier | Cast | Actor | Dr. Pierre |
Marcel Melrac | Cast | Le chauffeur de taxi (uncredited) | |
Marcel Raine | Cast | Actor | Un complice de Dandurand (uncredited) |
Maurice Salabert | Cast | Un inspecteur (uncredited) | |
Pierre Ferval | Cast | Un gendarme (uncredited) | |
Santa Relli | Cast | Actress | Cécile |
 Yves Deniaud | Cast | Actor | Machepied |
Charlotte Ecard | Cast | L'amie de la concierge (uncredited) | |
Fernand Blot | Cast | Un inspecteur (uncredited) | |
 Paul Barge | Cast | Actor | Monsieur Louis (uncredited) |
Marius David | Cast | (uncredited) | |
Eugène Frouhins | Cast | Le serrurier (uncredited) | |
Alice Gosset | Cast | La femme au tandem (uncredited) | |
| Person | Type | Job | Role(s) |
