The Ring of the Fisherman, also known as the Piscatory Ring, is an official part of the regalia worn by the pope, who according to Catholic theology is the head of the Catholic Church and successor of Saint Peter, who was a fisherman by trade. It used to feature a bas-relief of Peter fishing from a boat, a symbolism derived from the tradition that the apostles were "fishers of men". The Fisherman's Ring is a signet used until 1842 to seal official documents signed by the pope. Since at least the Middle Ages it has been a tradition for Catholics meeting the pope to show their devotion by kissing the ring.

Papal regalia and insignia are the official items of attire and decoration proper to the Pope in his capacity as the visible head of the Catholic Church and sovereign of the Vatican City State.