Pere Ardiaca i Martí (1909 in Balaguer, Lleida Province – 5 November 1986 in Moscow) was a Spanish Catalan communist politician.
In 1926 he moved to Barcelona, where he worked as a painter decorator until 1929 where he was forced to emigrate to France, because he refused military service.
On the proclamation of the Second Spanish Republic, he returned to Spain and his native Balaguer, where he became affiliated with the Bloc Obrer i Camperol.
In 1933 he left this group and joined the Communist Party of Catalonia, where in just a year later he became Political Secretary.
After the death of Franco, he was a candidate for the first elections to the Parliament of Catalonia, and chosen deputy to congress for Lérida.