German submarine U-308 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The U-boat was laid down on 5 November 1941 at the Flender Werke in Lübeck as yard number 308, launched on 31 October 1942 and commissioned on 23 December 1942 under the command of Leutnant zur See Karl Mühlenpfordt.