The film portrays the comic adventures of a group of summertime travellers. Produced at the height of the fascist era, Treno popolare was nonetheless free of propaganda, and featured the first film score by the legendary composer Nino Rota.
| Actor | Role |
|---|---|
| MMarcello SpadaGiovanni | Giovanni |
 Lina GennariLina | Lina |
| CCarlo PetrangeliCarlo | Carlo |
| JJone FrigerioThe Jealous Wife | The Jealous Wife |
| CCesare ZoppettiThe Gallant Man | The Gallant Man |
 Maria DenisMaria | Maria |
 Giuseppe PierozziThe Abusive Traveler | The Abusive Traveler |
 Gino ViottiThe Old Man with Bow Tie | The Old Man with Bow Tie |
| AAldo FrosiA Traveler (uncredited) | A Traveler (uncredited) |
 Raffaello MatarazzoThe Director of the Band (uncredited) | The Director of the Band (uncredited) |
 Giuseppe RicagnoA Traveler (uncredited) | A Traveler (uncredited) |
| UUmberto SacripanteA Traveler (uncredited) | A Traveler (uncredited) |
| IItalo TancrediA Traveler (uncredited) | A Traveler (uncredited) |