| Person | Type | Job | Role(s) |
|---|---|---|---|
 Armando Nannuzzi | Crew | Camera | Director of Photography |
 Claudio Mancini | Crew | Production | Executive Producer |
 Ennio Morricone | Crew | Sound | Original Music Composer, Music Director |
 Ernesto Gastaldi | Crew | Writing | Screenplay, Story |
Franco Coduti | Crew | Production | Unit Manager |
Fulvio Morsella | Crew | Production | Producer, Story |
Gianni Polidori | Crew | Art | Production Design |
Giuseppe Ruzzolini | Crew | Camera | Director of Photography |
Grazia De Rossi | Crew | Costume & Make-Up | Hair Designer |
 John Landis | Crew | Crew | Stunts |
 Nino Baragli | Crew | Editing | Editor |
Rita Agostini | Crew | Directing | Script Supervisor |
 Sergio Leone | Crew | Directing | Second Assistant Director, Second Unit Director, Executive Producer, Idea |
 Sergio Salvati | Crew | Camera | Director of Photography |
 Tonino Valerii | Crew | Directing | Director |
Vera Marzot | Crew | Costume & Make-Up | Costume Design |
 Stefano Rolla | Crew | Directing | Assistant Director |
Paolo Gargano | Crew | Production | Unit Manager |
Nilo Jacoponi | Crew | Costume & Make-Up | Makeup Artist |
Piero Lazzari | Crew | Production | Production Supervisor |
Rossana Maiuri | Crew | Editing | Assistant Editor |
Alexander Allerson | Cast | Actor | Rex |
 Angelo Novi | Cast | Actor | Bartender |
 Antoine Saint-John | Cast | Actor | Scape |
 Benito Stefanelli | Cast | Actor | Porteley |
 Carla Mancini | Cast | Actress | Mother |
 Franco Angrisano | Cast | Actor | Ferroviere |
 Geoffrey Lewis | Cast | Actor | Leader of the Wild Bunch |
 Henry Fonda | Cast | Actor | Jack Beauregard |
 Hubert Mittendorf | Cast | Carnival Barker | |
 Jean Martin | Cast | Actor | Sullivan |
 Karl Braun | Cast | Actor | Jim |
 Leo Gordon | Cast | Actor | Red |
 Luigi Antonio Guerra | Cast | Actor | Official |
 Marc Mazza | Cast | Actor | Don John |
 Mario Brega | Cast | Actor | Pedro |
Maurice Kowalewski | Cast | New Orleans Street Photographer (uncredited) | |
 Piero Lulli | Cast | Actor | Sheriff |
 R. G. Armstrong | Cast | Actor | Honest John |
 Rainer Peets | Cast | Actor | Big Gun |
 Steve Kanaly | Cast | Actor | False barber |
 Terence Hill | Cast | Actor | Nobody |
 Tommy Polgár | Cast | Actor | Juan |
 Neil Summers | Cast | Actor | Squirrel |
 Antonio Palombi | Cast | Dirty | |
 Emil Feist | Cast | Dwarf | |
Ullrich Müller | Cast | Man | |
Claus Schmidt | Cast | Man | |
| Person | Type | Job | Role(s) |
