Gustav Adolf Bauer (About this sound listen ; 1870–1944) was a German Social Democratic Party leader and Chancellor of Germany from 1919 to 1920. He served as head of government for a total of 219 days. Prior to becoming head of government, Bauer had been Minister of Labour in the first democratically elected German cabinet. After his cabinet resigned in March 1920, Bauer served as vice-chancellor, Minister of Transportation, and Minister of the Treasury in other cabinets of the Weimar Republic.