Roman Felleis (18 March 1903 – 24 August 1944) was an Austrian political activist. He was a close friend of Bruno Kreisky, with whom he founded the "Revolutionäre Sozialistischen" ("Revolutionary Socialists") organisation in February 1934. After Austria's annexation by Nazi Germany in March 1938, both men knew it was only a matter of time before the Gestapo would come for them. Kreisky took an opportunity to flee to Sweden later that same year. Felleis refused to leave. He found work as a road builder which enabled him to change his home frequently and live illegally "underground" (unknown to the public authorities) so that he might, when he considered the time was right, create and develop cells of party activists. He died on 24 August 1944 as the result of an American bombing raid against Buchenwald concentration camp to where, by this time, he had been taken.