General elections were held in Panama on 10 May 1964, electing both a new President of the Republic and a new National Assembly. Seven candidates competed in the 1964 presidential elections, although only three were serious contenders. Marco Aurelio Robles, who had served as minister of the presidency in Roberto F. Chiari's cabinet, was the candidate of the , comprising the PLN and 7 smaller parties. After lengthy backstage maneuvers, Robles was endorsed by the outgoing president. , a former member of the National Assembly and public works minister and brother-in-law of former President Ernesto de la Guardia, was the candidate of the coalition, comprising 6 parties headed by the CPN. Arnulfo Arias was supported by the PP, already the largest single party in the country.