The Provisional Government of National Unity was a puppet government formed by the decree of the State National Council on 28 June 1945 as a result of reshuffling the Soviet-backed Provisional Government of the Republic of Poland established by the Polish Workers' Party through inclusion of politicians from the close political sphere of Stanisław Mikołajczyk, the former prime minister of the Polish government-in-exile based in London. Inclusion of the latter group provided an excuse for the Western allies to approve tacitly the fait accompli of Poland becoming part of the Soviet sphere of influence, and to legitimise the Warsaw government while withdrawing their recognition of the Polish government-in-exile.

Stanisław Mikołajczyk was a Polish politician. He was a Prime Minister of the Polish government-in-exile during World War II, and later Deputy Prime Minister in post-war Poland until 1947.