 | Gian Maria Volonté als M. |
 | Marcello Mastroianni als Don Gaetano |
 | Mariangela Melato als Giacinta |
 | Ciccio Ingrassia als Voltrano |
 | Franco Citti als Autista di M. |
 | Cesare Gelli als Arras |
 | Michel Piccoli als Lui |
 | Renato Salvatori als Dr. Scalambri |
 | Tino Scotti als Il cuoco |
 | Adriano Amidei Migliano als Capra-Profiri |
 | Giancarlo Badessi als Ventre |
 | Marion Bartoli als Primogenito Lombo |
| Nito Costa als Prete giovane |
 | Guerrino Crivello als Speaker TV |
 | Marcella Di Falco als Saccà |
 | Giulio Donnini als Bastante |
| Aldo Farina als Restrero |
| Giuseppe Leone als Martellini |
 | Renato Malavasi als Michelozzi |
 | Riccardo Mangano als Cardinal Beccarisi |
 | Piero Mazzinghi als Caprarozza |
| Lino Murolo als Mozio |
 | Piero Nuti als Schiavò |
| Loris Pereira Lopez als Lombo sr. |
| Riccardo Satta als Lomazzo |
 | Luigi Uzzo als Aldo Lombo |
 | Luigi Zerbinati als Caudo |
| Elio Petri | Director |
| Elio Petri | Screenplay |
| Ruggero Mastroianni | Editor |
| Luigi Kuveiller | Director of Photography |
| Ennio Morricone | Original Music Composer |
| Daniele Senatore | Producer |
| Dante Ferretti | Production Design |
| Leonardo Sciascia | Novel |
| Osvaldo Desideri | Set Decoration |
| Franco Carretti | Costume Design |
| Berto Pelosso | Co-Writer |
| Francesco Genesi | Associate Producer |
| Giorgio Cardelli | Associate Producer |
| Ubaldo Terzano | Camera Operator |
| Umberto Angelucci | First Assistant Director |
| Vasco Mafera | Production Supervisor |
| Alfredo Petri | Production Supervisor |
| Sergio Strizzi | Still Photographer |
| Mario Bramonti | Sound |
| Alfonso Gola | Makeup Department Head |
| Sergio Emidi | Key Grip |
| Sergio Coletta | Gaffer |
| Stefano Pegoraro | Production Manager |
| Ennio Morricone | Conductor |
| Renato Palmieri | Assistant Camera |
| Antonio Tonti | Assistant Camera |
| Giovanni Piccioni | Second Assistant Director |
| Luigina Lovari | Script Supervisor |
| Janice Munro | Production Secretary |
| Giulio Viggiani | Boom Operator |
| Pietro Tenoglio | Makeup Artist |
| Giusy Bovino | Hairstylist |
| Cecilia Catalucci | Assistant Editor |
| Erminia Marani | Assistant Editor |
| Ivana Boggian | Assistant Editor |
| Hermes Gallippi | Administration |
| Antonio Mastronardi | Administration |
| Tiziana Mancini | Assistant Costume Designer |
| Italo Cameracanna | Visual Effects |
| Franco Bassi | Sound Mixer |
| Alberto Bartolomei | Sound Mixer |
