The Peace Research Institute Oslo (PRIO; Norwegian: Institutt for fredsforskning) is a private research institution in peace and conflict studies, based in Oslo, Norway, with around 100 employees. It was founded in 1959 by a group of Norwegian researchers led by Johan Galtung, who was also the institute's first director (1959–1969). It publishes the Journal of Peace Research, also founded by Johan Galtung.
