 | Steve Reeves als Ercole (Hercules) |
 | Sylva Koscina als Iole, Daugher of Pelias |
 | Fabrizio Mioni als Jason |
 | Gianna Maria Canale als Antea, Queen of the Amazons |
 | Arturo Dominici als Eurysteus |
 | Mimmo Palmara als Iphitus, Son of Pelias |
 | Lidia Alfonsi als The Sybil |
 | Gabriele Antonini als Ulysses |
 | Aldo Fiorelli als Argos |
| Andrea Fantasia als Laertes |
 | Luciana Paluzzi als Iole's Maid |
 | Ivo Garrani als Pelias, King of Iolcus |
 | Gina Rovere als amazzone |
| Lily Granado als amazzone |
 | Afro Poli als Chironi |
| Gino Mattera als Orpheus |
| Gian Paolo Rosmino als Aesculapius |
 | Willi Colombini |
| Fulvio Carrara |
 | Aldo Pini als Tifi |
| Guido Martufi als Iphitus as a child |
 | Paola Quattrini als Iole as a child |
| Romano Barbieri |
| Augusto Belardelli |
| Spartaco Nale |
| Mario Serandrei | Editor |
| Pietro Francisci | Director |
| Enzo Masetti | Original Music Composer |
| Pietro Francisci | Adaptation |
| Corrado Bartoloni | Camera Operator |
| Federico Teti | Producer |
| Mario Bava | Director of Photography |
| Apollonios Rhodios | Novel |
| Ennio De Concini | Screenplay |
| Pietro Francisci | Screenplay |
| Gaio Fratini | Screenplay |
| Flavio Mogherini | Production Design |
| Gianni D'Aloisio | Assistant Production Design |
| Giulio Coltellacci | Costume Design |
| Paolo Tommasi | Assistant Costume Designer |
| Massimo Tavazzi | Set Decoration |
| Ettore Mattia | First Assistant Director |
| Pietro Nuccorini | Second Assistant Director |
| Gigliola Rosmino | Script Supervisor |
| Titta Perozzi | Assistant Editor |
| Mario Pisani | Unit Manager |
| Spartaco Conversi | Production Secretary |
| Ubaldo Terzano | Assistant Camera |
| Silvio Fraschetti | Assistant Camera |
| Giulio Tagliacozzo | Sound |
| Gisa Geert | Choreographer |
| Euclide Santoli | Makeup Artist |
| Mara Rocchetti | Hairstylist |
| Mario Bava | Special Effects |
| Renato Cadueri | Sound Mixer |
| Carlo Savina | Conductor |
| Ferruccio De Martino | Production Manager |
| Massimo De Rita | Production Assistant |
