Deutsche Schiff- und Maschinenbau AG

Infobox Defunct Company
company_name = Deutsche Schiff- und Maschinenbau AG
company_
fate = Bankrupt
successor =
foundation = 1926
defunct = 1983
location = Bremen, Germany
industry = Shipbuilding
key_people =
products = Passenger ships
Merchant ships
U-boats
Warships
num_employees =
parent =
subsid = Weser Flugzeugbau

Deutsche Schiff- und Maschinenbau AG (often abbreviated DeSchiMAG or just Deschimag) was a prominent German shipbuilding company located in Bremen.

DeSchiMAG was founded in 1926 when AG Weser and eight other shipyards merged. It extended into aircraft construction in 1934, by founding a subsidiary, Weser Flugzeugbau. It began production in that year at Tempelhof in Berlin, and became the fourth largest aircraft manufacturer in Germany during World War II.

In 1941, a majority shareholding was acquired by Krupp, the German engineering and armaments conglomerate.

The Bremen shipyards were prominent in the construction of warships in World War II and suffered in the consequent air raids. After the war, the company was refounded in Bremen in 1949, to include ownership of Seebeckwerft in Bremerhaven. It was declared bankrupt in 1983 and Seebeckwerft was spun off and the AG Weser operations were shut down.