Tullio Vecchietti (29 July 1914 – 15 January 1999) was an Italian politician and journalist.

During the Second World War Tullio Vecchietti participated in the Italian resistance movement.

Contrary to participation in the government with the Christian Democracy, in 1963 he founded the Italian Socialist Party of Proletarian Unity, together with Lelio Basso, Vittorio Foa, Lucio Libertini and Emilio Lussu and Dario Valori.

[1] Vecchietti was secretary of the PSIUP from the foundation until September 1971, when he was replaced by Dario Valori.

After the electoral defeat of 1972, Tullio Vecchietti, together with numerous comrades, joined the Italian Communist Party.