Hans Paul Oster (9 August 1887 – 9 April 1945) was a general in the Wehrmacht of Nazi Germany and a leading figure of the German resistance from 1938 to 1943. As deputy head of the counter-espionage bureau in the Abwehr (German military intelligence), Oster was in a good position to conduct resistance operations under the guise of intelligence work; he was dismissed for helping Jews avoid arrest.
He was involved in the Oster Conspiracy of September 1938 and was arrested in 1943 on suspicion of helping Abwehr officers caught helping Jews escape Germany. After the failed 1944 July Plot on Hitler‘s life, the Gestapo seized the diaries of Admiral Wilhelm Canaris, the head of Abwehr, in which Oster‘s anti-Nazi activities were revealed. In April 1945, he was hanged with Canaris and Dietrich Bonhoeffer at Flossenbürg concentration camp.