The office of First Deputy Premier of the Soviet Union, also called First Vice Premier of the Soviet Union, was synonymous with vice-head of government of the Union of Soviet Socialist Republics (USSR); a First Deputy Premier did not always serve in his post alone. A total of 26 individuals had held this post; 18 of them held other posts simultaneously with their First Deputy Premiership. The first officeholder was Valerian Kuibyshev, who was inaugurated in 1934 as First Deputy Chairman of the Council of People's Commissars (, abbreviated Sovnarkom). Lavrentiy Beria spent the shortest time in office and served for 113 days. At over seventeen years, Vyacheslav Molotov spent the longest time in office, and held his position through most of Joseph Stalin's tenure as Premier, as well as through the tenureships of Georgy Malenkov and Nikolai Bulganin.