German submarine U-2342 was a short-lived Type XXIII U-boat of Nazi Germany's Kriegsmarine during the Second World War.

She was built at Hamburg during 1944 as a modern Type XXIII "Elektroboote", a small coastal class designed to strike ships along the coastlines of Britain and liberated Europe, particularly the English Channel, although none ever served there.

U-2342 was placed under the command of Oberleutnant zur See der Reserve Berthold Schad von Mittelbiberach, a former senior non-commissioned officer, who received a field promotion in 1943.

U-2342 was travelling in a convoy of ten boats taking essential supplies and personnel to Norway on Boxing Day 1944.

Whilst just north of Swinemünde, U-2342 activated an air-dropped mine and fell out of the convoy, slowly sinking as the other boats carried on their passage northwards.