Pierre Clémenti as Giacobbe I and II

Tina Aumont as Salesgirl

Sergio Tofano as Professor Petrushka

Giulio Cesare Castello as Professor Mozzoni

Romano Costa as Clara's father

Antonio Maestri as Professor 'Tre Zampe'

Mario Venturini as Professor

Alessandro Cane as Student

Gianpaolo Capovilla as Student

Ninetto Davoli as Student

Vittorio Fanfoni as Student

Luigi Antonio Guerra as Student

Giuseppe Mangano as Student

Giancarlo Nanni as Student

Stefano Oppedisano as Student

Salvatore Samperi as Student

Umberto Silva as Student

Stefania Sandrelli as Clara