Polski Słownik Biograficzny (PSB; Polish Biographical Dictionary) is a Polish-language biographical dictionary, comprising an alphabetically arranged compilation of authoritative biographies of some 25,000 notable Poles and of foreigners who have been active in Poland – famous as well as less-well-known persons – from Popiel, Piast Kołodziej, and Mieszko I, at the dawn of Polish history, to persons who died in the year 2000.

Polski słownik biograficzny constitutes a unique mosaic that depicts the full sweep of Polish history through biographies of many of the country's most notable people.

This reference work has been published in Kraków since 1935, although publication was suspended during Poland's World War II occupation by Nazi Germany and during the Stalinist period.

Tadeusza Manteuffla [pl]) and is sponsored by the Foundation for Polish Learning (Fundacja na Rzecz Nauki Polskiej) and the Ministry of Culture and National Heritage (Ministerstwo Kultury i Dziedzictwa Narodowego).

After the war, by 1949, when Konopczyński was forced by the communist government to resign his editorship, two more volumes had been published (covering bios to "Firlej, Henryk").

In 1964, after the Dictionary had grown by an additional three volumes (covering bios to "Jarosiński, Paweł"), Lepszy died and was replaced by Emanuel Rostworowski.