Oskar Bartel was born on 24 October in Władysławowo (Wielkopolskie Voivodeship). During World War II he lived in Warsaw. Married to Zofia, who was Jewish. He prepared false documents for her under the name Jadwiga Idzikowska. He also organised a hiding place for her with the Kuszll family in Przytoczno (Lubelskie Province). He passed away on 5 November 1973 in Warsaw.