Type	XB
Laid down	1 Oct, 1941	Germaniawerft, Kiel
Commissioned	2 Mar, 1944	Kptlt. Johann-Heinrich Fehler
Commanders	03.44 - 05.45	Kptlt. Johann-Heinrich Fehler
Career	1 patrol	2 Mar, 1944 - 28 Feb, 1945  5. Flottille (training) 1 Mar, 1945 - 8 May, 1945  33. Flottille (front boat)
Successes	No successes
Fate	Surrendered at Portsmouth, New Hampshire on May 16, 1945.

 U-234 suffered bomb damage while under construction in 1942. After the loss of U-233 in July 1944 it was decided not to use U-234 as a mine-laying boat. She was then rebuilt as a Japan-transporter. On 25 March 1945 they left Kiel and a few days later reached Kristiansand, Norway.

On 16 April, 1945 she left Norway and was enroute to Japan with extremely important cargo (drawings, a Me-262 jet fighter in crates and 560kg of uranium ore, several high ranking German experts on various technologies and 2 Japanese officers) when Kptlt. Fehler, after hearing the cease-fire orders on May 4, 1945, decided to head for the USA and surrender.

Per tradition the Japanese men took their own life via sleeping pills rather than being captured (?).

Men lost from U-boats

Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-234 did not suffer any casualties (we know of) until the time of her loss.