Jean-Claude Brialy as Paul Martin

Michel Serrault as Baudu, police inspector

Louis de Funès as Norbert Charolais, General Director of 321

Sophie Daumier as Solange, secretary and lover of Paul

Anne Tonietti as Danielle Brossard, Paul's fiancée

Henri Virlogeux as Mr. Brossard

Alfred Adam as Hubert Beaumanoir, senior manager of 321

René Clermont as Frépillon, senior manager of 321

Jacques Dynam as Macheron, Paul's collaborator

Paul Gay as TV announcer

Gilberte Géniat as Madame Brossard

Jean Ozenne as D'Aleyrac, senior manager of 321

Guy Bedos as

Marc Arian as Bailiff (uncredited)

André Badin as Sandals representative (uncredited)

Charles Bayard as Representative (uncredited)

Marcel Bernier as Newspaper buyer (uncredited)

Robert Blome as Agency collaborator (uncredited)

Florence Blot as Manager of 'Paris Élite' (uncredited)

Philippe Castelli as Doorman of 321 (uncredited)

Henri Coutet as (uncredited)

Martine de Breteuil as Guest (uncredited)

Alain Delon as Lambert, new employee (uncredited)

Albert Dinan as Man (uncredited)

Anne Doat as (uncredited)

René Hell as Mr. Martin (uncredited)

Guy Henry as (uncredited)

Michel Modo as Postman (uncredited)

Max Montavon as Police officer (uncredited)

Jean Obé as Parking employee (uncredited)

Jean-Claude Rémoleux as Employee of 321 (uncredited)

Pierre Tchernia as Legris, new senior executive of 321 (uncredited)

André Tomasi as Inspector (uncredited)

Dominique Zardi as (uncredited)

Jean-Pierre Zola as Sandals representative (uncredited)

Gisèle Grandpré as Mrs. Charolais (uncredited)