Janusz Gajos (born September 23, 1939 in Dąbrowa Górnicza in Poland) is a Polish actor. He graduated in 1965 from the Polish Film and Theater Academy in Łódź.
He debuted in 1964 (while still in film school) in a film for young audiences called "Panienka z okienka." Shortly afterwards he was cast in a role of Janek Kos in a widely popular TV WWII series "Czterej pancerni i pies" (Four tank men and a dog). A popular Polish actor, he starred in numerous other films and theatrical plays, notably in Krzysztof Kieślowski's Three Colors: White.