The Peace Research Institute Frankfurt (acronym: PRIF, German: Leibniz-Institut Hessische Stiftung Friedens- und Konfliktforschung, short HSFK) is a research institute in Frankfurt am Main focused on violent international and internal conflicts and research of conditions for and promotion of the concept of peace. With over 90 employees (as of 2019), PRIF is one of the largest peace research institutes in Germany.