German submarine U-705 was a Type VIIC U-boat of the German Kriegsmarine during World War II. Commissioned on 30 December 1941, she served with the 5th U-Boat Flotilla until 31 July as a training boat, and as a front boat of 66th Flotilla under the command of Kapitänleutnant Karl-Horst Horn, until her sinking on 3 September 1942.