Marian Kociniak was born on January 11, 1936 in Warsaw, Mazowieckie, Poland. He was an actor, known for Jak rozpetalem druga wojne swiatowa (1970), Danton (1983) and Trójkat bermudzki (1988). He was married to Grazyna Kociniak. He died on March 17, 2016 in Warsaw.