Italian Socialist Party of Proletarian Unity

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Italian Socialist Party of Proletarian Unity Partito Socialista Italiano di Unità Proletaria
Abbreviation	PSIUP
President	Lelio Basso
General Secretary	Tullio Vecchietti
Spokesperson	Dario Valori
Founded	12 January 1964 (1964-01-12)
Dissolved	13 July 1972 (1972-07-13)
Split from	Italian Socialist Party
Merged into	Italian Communist Party
Headquarters	Rome, Italy
Newspaper	Mondo nuovo
Ideology	Socialism Marxism Frontism Factions Pro-Soviet Union Revolutionary socialism Libertarian socialism
Political position	Left-wing Factions Far-left
Colours	Red
Politics of Italy Political parties Elections

The Italian Socialist Party of Proletarian Unity (Partito Socialista Italiano di Unità Proletaria, PSIUP) was a political party in Italy, active from 1964 to 1972.