The Armed Forces Museum of Norway (Norwegian: Forsvarsmuseet - The Defence Museum) is a museum located at Akershus Fortress in Oslo, Norway.

The museum consists of mostly army materiel.

At first the museum was open only to military personnel, but was opened to the public in 1978 by King Olav V under the name of the Armed Forces Museum.

The museum is located inside the Castle Square, in one of the old military arsenals from the 1860s.

The main purpose of the museum is to show the Norwegian military history from the Viking Age to the present, and the museum consists of six departments: In addition, there are periods of special exhibitions.