 Jean-Louis TrintignantMarcello Clerici | Marcello Clerici |
 Stefania SandrelliGiulia | Giulia |
 Gastone MoschinManganiello | Manganiello |
 Dominique SandaAnna Quadri | Anna Quadri |
 Enzo TarascioProfessor Quadri | Professor Quadri |
 Fosco GiachettiThe Colonel | The Colonel |
 José QuaglioItalo Montanari | Italo Montanari |
 Yvonne SansonGiulia's Mother | Giulia's Mother |
 MillyMarcello's Mother | Marcello's Mother |
| AAntonio MaestriConfessor | Confessor |
 Alessandro HaberDrunk Blind Man | Drunk Blind Man |
 Luciano RossiBlind Blond | Blind Blond |
 Massimo SarchielliBlind Man | Blind Man |
| PPierangelo CiveraFranz | Franz |
 Giuseppe AddobbatiMarcello's Father | Marcello's Father |
 Christian AlignyRaoul | Raoul |
 Carlo GaddiHired Killer | Hired Killer |
| UUmberto SilvestriHired Killer | Hired Killer |
| FFurio PelleraniHired Killer | Hired Killer |
 Luigi Antonio GuerraNot listed | Not listed |
 Orso Maria GuerriniNot listed | Not listed |
| PPasquale FortunatoYoung Marcello | Young Marcello |
 Pierre ClémentiPasqualino 'Lino' Semirama | Pasqualino 'Lino' Semirama |
 Sergio GrazianiMarcello Clerici (voice) | Marcello Clerici (voice) |
 Rita SavagnoneAnna (voice) | Anna (voice) |
 Arturo DominiciThe Colonel (voice) | The Colonel (voice) |
 Giuseppe RinaldiItalo (voice) | Italo (voice) |
| LLydia SimoneschiGiulia's Mother (voice) | Giulia's Mother (voice) |
 Gianni AmicoPupil Prof. Quadri (uncredited) | Pupil Prof. Quadri (uncredited) |
 Joel BarcellosPupil Prof. Quadri (uncredited) | Pupil Prof. Quadri (uncredited) |
