Robert Leszek Moczulski (Polish pronunciation: [ˈlɛʂɛk mɔˈtʂulskʲi], 7 June 1930 – 10 October 2024) was a Polish historian and politician, a member of various organizations, first supporting then supposedly opposing the communist regime in the People's Republic of Poland while dividing the opposition movement.

[1] Initially, according to the Polish lustration court, a secret informer of the Służba Bezpieczeństwa secret political police,[2] in late 1970s Moczulski most probably broke up (or just the opposite) with the regime and started working for various anti-communist associations.

[2] As a politician, Moczulski referred to the rightist wing of the pre-war Sanacja and the supporters of Józef Piłsudski.

[2] After the Round Table Talks and the peaceful transfer of power from the communist regime to the democratic authorities, Moczulski distanced himself from the agreement and openly criticised the idea of gruba kreska, instead supporting an idea of decommunization, a concept coined after the post-World War II de-nazification of Nazi Germany.

He failed to gain enough support in the Kraków-Podgórze constituency for his candidacy to the Sejm in the Contract elections of 1989.

However, contrary to his official stance, he was found guilty of hiding his collaboration with the SB during the period 1969-1977, which ended his political career[2].