Trailer
Images
 | Claudia Cardinale as Jill McBain |
 | Henry Fonda as Frank |
 | Jason Robards as Manuel 'Cheyenne' Gutiérrez |
 | Charles Bronson as Harmonica |
 | Gabriele Ferzetti as Morton - Railroad Baron |
 | Paolo Stoppa as Sam |
 | Woody Strode as Stony - Member of Frank's Gang |
 | Jack Elam as Snaky - Member of Frank's Gang |
 | Keenan Wynn as Sheriff - Auctioneer |
 | Frank Wolff as Brett McBain |
 | Lionel Stander as Barman |
 | Enzo Santaniello as Timmy McBain (uncredited) |
| Simonetta Santaniello as Maureen McBain (uncredited) |
 | Marco Zuanelli as Wobbles (uncredited) |
| Al Mulock as Knuckles - Member of Frank's Gang (uncredited) |
 | John Frederick as Jim - Member of Frank's Gang (uncredited) |
| Michael Harvey as Frank's Lieutenant (uncredited) |
 | Benito Stefanelli as Frank's Lieutenant (uncredited) |
 | Antonio Molino Rojo as Member of Frank's Gang at Auction (uncredited) |
 | Fabio Testi as Member of Frank's Gang at Auction (uncredited) |
 | Frank Braña as Member of Frank's Gang at Auction (uncredited) |
| Paolo Figlia as Member of Frank's Gang at Auction (uncredited) |
 | Saturno Cerra as Member of Frank's Gang on Train (uncredited) |
 | Spartaco Conversi as Member of Frank's Gang on Train (uncredited) |
| Aldo Berti as Member of Frank's Gang on Train (uncredited) |
 | Aldo Sambrell as Cheyenne's Gang Member (uncredited) |
 | Lorenzo Robledo as Cheyenne's Gang Member (uncredited) |
 | Bruno Corazzari as Cheyenne's Gang Member (uncredited) |
| Antonio Palombi as Station Agent (uncredited) |
| Luukialuana Kalaeloa as Indian Woman (uncredited) |
| Renato Pinciroli as First Bidder at Auction (uncredited) |
| Claudio Mancini as Harmonica's Brother (uncredited) |
 | Conrado San Martín as Vecino (uncredited) |
| Directing | |
| Sergio Leone | Director |
Sound | |
| Ennio Morricone | Original Music Composer |
Camera | |
| Tonino Delli Colli | Director of Photography |
Editing | |
| Nino Baragli | Editor |
Art | |
| Carlo Simi | Production Design |
Costume & Make-Up | |
| Antonella Pompei | Costume Design |
| Carlo Simi | Costume Design |
Crew | |
| Eros Bacciucchi | Special Effects |
| John Landis | Stunts |
Production | |
| Bino Cicogna | Executive Producer |
| Fulvio Morsella | Producer |
Writing | |
| Dario Argento | Story |
| Bernardo Bertolucci | Story |
| Sergio Leone | Story |
| Sergio Leone | Screenplay |
| Sergio Donati | Screenplay |
Production | |
| Claudio Mancini | Producer |
Sound | |
| Roberto Arcangeli | Sound Effects |
