German submarine U-146 was a Type IID U-boat of the Nazi German Kriegsmarine during World War II. Her keel was laid down on 10 April 1940 by Deutsche Werke in Kiel as 'werk' 277. She was launched on 16 November 1940 and commissioned on 28 December with Oberleutnant Hans-Jürgen Radke in command. U-148 began her service life with the 24th U-boat Flotilla. She was then assigned to the 21st flotilla and subsequently to the 31st flotilla. She spent the war as a training vessel. She was scuttled in May 1945.