International Bureau of Revolutionary Youth Organizations (in German: Internationales Büro Revolutionärer Jugendorganisationen, in French: Bureau International des Organisations Révolutionnaires des Jeunes) was an international organization of socialist youth, formed in 1934.
The founding congress was held in the Netherlands, hosted by the Independent Socialist Party (OSP).
The congress elected a Bureau (with one representative of each participating organization) and a Secretariat.
The Secretariat had three members, one from the SAPD (Willy Brandt), one from the International Left Opposition (Heinz Epe) and one from the Socialist Party of Sweden.
In 1935 the Trotskyists were expelled from the Bureau, as they had collectively embarked on entryism into the major labour parties (which was contrary to the ambitions of IBRYO and the London Bureau to build a new international).