Paweł Nowisz
(Rysio)
Marian Opania
(Stasio)
Leon Niemczyk
(Dogcatcher / Professor Kazio)
Hanna Małkowska
(Rysio's mother-in-law / Cook)
Mirosława Marcheluk
(Rysio's wife)
Krystyna Feldman
(Master's degree holder)
Barbara Chojecka
Lena Wilczyńska
(Master's degree holder in a dog shelter)
Wiesław Drzewicz
(Mr. Józio)
Władysław Dewoyno
(Professor)
Wirgiliusz Gryń
(Rysio's neighbor)
Mirosław Szonert
(Vet)
Franciszek Trzeciak
(Dogcatcher's helper)
Eugeniusz Wałaszek
(Man with a dog)
Bogdan Wiśniewski
Barbara Chmielewska
Monika Bartczak
Walentyna Sakkilari
Zofia Plewińska
Agnieszka Kusza
Jerzy Moniak
(Waiter (uncredited))
Maria Probosz
(Rysio's pupil (uncredited))