| Person | Type | Job | Role(s) |
|---|---|---|---|
 Adolfo Cofiño | Crew | Art | Assistant Set Decoration |
Adriano Bolzoni | Crew | Writing | Screenstory |
 Akira Kurosawa | Crew | Writing | Original Story |
Alberto Gutiérrez | Crew | Costume & Make-Up | Makeup Artist |
 Alessandro Alessandroni | Crew | Sound | Musician, Music Arranger |
Alfonso Santacana | Crew | Editing | Editor |
Arrigo Colombo | Crew | Production | Producer |
 Benito Stefanelli | Crew | Crew | Stunts, Stunt Coordinator |
 Carlo Simi | Crew | Art | Art Direction, Set Decoration, Costumer |
Dolores Clavel | Crew | Costume & Make-Up | Hairstylist |
 Duccio Tessari | Crew | Writing | Screenplay |
Eduardo Noé | Crew | Camera | Second Assistant Camera |
Elio Pacella | Crew | Sound | Sound |
 Ennio Morricone | Crew | Sound | Original Music Composer, Conductor |
Federico G. Larraya | Crew | Camera | Director of Photography |
 Fernando Di Leo | Crew | Writing | Screenplay |
Fernando Rossi | Crew | Production | Unit Manager |
Francisco Rodríguez Asensio | Crew | Art | Set Decoration |
Franco Giraldi | Crew | Directing | Assistant Director, Second Unit Director |
Franco Palaggi | Crew | Production | Production Manager |
Giorgio Papi | Crew | Production | Producer |
Giovanni Corridori | Crew | Crew | Special Effects |
Günter Raguse | Crew | Production | Production Manager |
Jaime Comas Gil | Crew | Writing | Screenplay, Production Manager |
José Luis Pérez | Crew | Costume & Make-Up | Assistant Makeup Artist |
Julio Sempere | Crew | Directing | Assistant Director |
Julio Wizuete | Crew | Camera | Still Photographer |
Manuel Baquero | Crew | Crew | Special Effects |
 Mario Caiano | Crew | Directing | Assistant Director |
 Massimo Dallamano | Crew | Camera | Director of Photography |
Michele Lacerenza | Crew | Sound | Musician |
 Nosher Powell | Crew | Crew | Stunts |
Ramón Crespo | Crew | Production | Production Manager |
Roberto Cinquini | Crew | Editing | Editor |
 Ryūzō Kikushima | Crew | Writing | Original Story |
Sam Watkins | Crew | Costume & Make-Up | Makeup Artist |
 Sergio Leone | Crew | Writing | Screenplay, Director, Screenstory |
 Sigfrido Burman | Crew | Art | Set Decoration |
 Stelvio Massi | Crew | Camera | Camera Operator |
 Tonino Valerii | Crew | Writing | Screenplay, Assistant Director |
Víctor Andrés Catena | Crew | Writing | Screenplay, Screenstory |
Ramón Sempere | Crew | Camera | First Assistant Camera |
Alicia Castillo | Crew | Editing | Assistant Editor |
José María Sánchez | Crew | Costume & Make-Up | Makeup Department Head |
Jerónimo Montoro | Crew | Production | Production Assistant |
Eugenio Villar | Crew | Production | Production Assistant |
 William R. Thompkins | Crew | Crew | Stunts, Master at Arms, Technical Advisor |
Anselmo Zabala | Crew | Production | Unit Production Manager |
Rafael Pérez Murcia | Crew | Art | Assistant Set Decoration |
Peter Tevis | Crew | Sound | Theme Song Performance |
María Casado | Crew | Costume & Make-Up | Wardrobe Designer |
José María Sánchez | Crew | Camera | Camera Operator |
Domenico Parrello | Crew | Camera | Second Assistant Camera |
Luis Ocaña | Crew | Art | Property Master |
Pietro Santini | Crew | Production | Production Assistant, Production Secretary |
Mark Lowell | Crew | Writing | Dialogue |
 Igino Lardani | Crew | Visual Effects | Animation, Title Designer |
Cantori Moderni Di Alessandroni | Crew | Sound | Theme Song Performance |
Tilde Watson | Crew | Directing | Script Supervisor |
María Antonia Puerta | Crew | Directing | Script Supervisor |
Marta Pons | Crew | Production | Production Assistant |
Géneviève Hersent | Crew | Production | Publicist |
 Aldo Sambrell | Cast | Actor | Rojo Gang Member |
 Antonio Molino Rojo | Cast | Actor | Baxter Gunman #2 (uncredited) |
Antonio Moreno | Cast | Juan De Dios (uncredited) | |
 Antonio Pica | Cast | Actor | Rojo Gang Member (uncredited) |
 Antonio Vico | Cast | Actor | (uncredited) |
Benito Stefanelli | Cast | Actor | Rubio |
 Bruno Carotenuto | Cast | Actor | Antonio Baxter |
 Clint Eastwood | Cast | Actor | Joe |
 Daniel Martín | Cast | Actor | Julián |
Edmondo Tieghi | Cast | Mexican Soldier (uncredited) | |
 Fernando Sánchez Polack | Cast | Actor | Rojo Gang Member Crushed by Wine Cask (uncredited) |
 Frank Braña | Cast | Actor | Baxter Gunman (uncredited) |
 Gian Maria Volonté | Cast | Actor | Ramón Rojo |
 Jose Halufi | Cast | Actor | Rojo Gang Member (uncredited) |
 Joseph Egger | Cast | Actor | Piripero |
 José Calvo | Cast | Actor | Silvanito |
 José Canalejas | Cast | Actor | Rojo Gang Member (uncredited) |
 José Orjas | Cast | Actor | (uncredited) |
 José Riesgo | Cast | Actor | Mexican Cavalry Captain (uncredited) |
 Juan Cortés | Cast | Actor | Cavalry Captain (uncredited) |
 Julio Pérez Tabernero | Cast | Actor | Baxter Gunman (uncredited) |
Lee Miller | Cast | Actor | Man at Bar (uncredited) |
 Lorenzo Robledo | Cast | Actor | Baxter Gunman #1 (uncredited) |
 Luis Barboo | Cast | Actor | Baxter Gunman #3 (uncredited) |
Manuel Peña | Cast | Actor | (uncredited) |
 Margarita Lozano | Cast | Actress | Consuelo Baxter |
 Marianne Koch | Cast | Actress | Marisol |
 Mario Brega | Cast | Actor | Chico |
 Nino Del Arco | Cast | Actor | Jesus (uncredited) |
 Sieghardt Rupp | Cast | Actor | Esteban Rojo |
 Umberto Spadaro | Cast | Actor | Miguel - Rojo Gunman (uncredited) |
 Wolfgang Lukschy | Cast | Actor | John Baxter |
 Álvaro de Luna | Cast | Actor | Rojo Gang Member (uncredited) |
 Antonio Prieto | Cast | Actor | Don Benito Rojo / Don Miguel Rojo |
William R. Thompkins | Cast | Actor | Baxter Gunman (uncredited) |
 Luis Rodríguez | Cast | Rojo Gang Member (uncredited) | |
Peter Tevis | Cast | The Balladeer (voice) (uncredited) | |
| Person | Type | Job | Role(s) |
