The papal conclave held on 25 and 26 August 1978 was the first of the two held that year. It was convoked to elect a successor to Paul VI, who had died on 6 August 1978. After the cardinal electors assembled in Rome, they elected Cardinal Albino Luciani, Patriarch of Venice, as the new pope on the fourth ballot. He accepted the election and took the name John Paul I.

A papal conclave is a gathering of the College of Cardinals convened to elect a bishop of Rome, also known as the pope. Catholics consider the pope to be the apostolic successor of Saint Peter and the earthly head of the Catholic Church.