A group of boys in pre-war Warsaw fight for the right to train at an abandoned square.
| Actor | Role |
|---|---|
 Ludwik HaliczMundek | Mundek |
| AAndrzej BłaszczykGapa | Gapa |
| MMarek CzynskiFranek / Leszek | Franek / Leszek |
 Lech RzegockiKazio | Kazio |
| TTadeusz Wiśniewski"Cowboy" | "Cowboy" |
| IIrena LeonieniHanna | Hanna |
| MMaryś NowakSzymek Nejman | Szymek Nejman |
| AAleksander KornelPilichowski | Pilichowski |
 Mariusz BenoitKuba | Kuba |
| MMarek PolakowAntoś | Antoś |
| LLudmiła WarzechaBronka | Bronka |
| IIrena Górska-DamięckaNot listed | Not listed |
 Monika Dzienisiewicz-OlbrychskaNot listed | Not listed |
 Cezary JulskiCezary | Cezary |
 Andrzej JurczakRysiek | Rysiek |
 Stanisław Marian KamińskiFranek's Father | Franek's Father |
 Zbigniew KoczanowiczNejman | Nejman |
| JJanina LukowskaNejmanowa | Nejmanowa |
 Irena MalkiewiczWoman on a Bench | Woman on a Bench |
 Bronisław PawlikAdult Franek | Adult Franek |
 Czesław PiaskowskiApple Seller | Apple Seller |
 Edward RadulskiCaretaker | Caretaker |
 Józef RetikNot listed | Not listed |
| RRemigiusz RogackiIce Cream Salesman | Ice Cream Salesman |
 Wacław Ścibor-RylskiNot listed | Not listed |
| GGitla SzachmajsterNot listed | Not listed |
 Jerzy Łapiński"Szmaja" (uncredited) | "Szmaja" (uncredited) |