Ernst-Günther Schenck (3 October 1904 – 21 December 1998) was a German Obersturmbannführer (lieutenant-colonel) and doctor who joined the SS in 1933. Because of a chance encounter with Adolf Hitler during the closing days of World War II, his memoirs proved historically valuable. His accounts of this period influenced those of Joachim Fest and James P. O'Donnell regarding the end of Hitler's life, and were included in the film Downfall (2004).