German submarine U-2343 was a Type XXIII U-boat of Nazi Germany's Kriegsmarine during World War II. She was ordered on 20 September 1943, and was laid down on 31 August 1944 at Deutsche Werft AG, Hamburg, as yard number 497. She was launched on 18 October 1944 and commissioned under the command of Oberleutnant zur See Harald Fuhlendorf on 6 November 1944.
Like all Type XXIII U-boats, U-2343 had a displacement of when at the surface and while submerged. She had a total length of (o/a), a beam width of (o/a), and a draught depth of. The submarine was powered by one MWM six-cylinder RS134S diesel engine providing , one AEG GU4463-8 double-acting electric motor electric motor providing , and one BBC silent running CCR188 electric motor providing .
The submarine had a maximum surface speed of and a submerged speed of . When submerged, the boat could operate at for ; when surfaced, she could travel at . U-2343 was fitted with two torpedo tubes in the bow. She could carry two preloaded torpedoes. The complement was 14 â 18 men. This class of U-boat did not carry a deck gun.
On 5 May 1945, U-2343 was scuttled in Gelting Bay near Gelting as part of Operation Regenbogen. The wreck was later raised and broken up.