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)