The National Military History Museum (Bulgarian: Национален военноисторически музей, Bulgarian: Natsionalen voennoistoricheski muzey) is a museum dedicated to military history in Sofia, Bulgaria.

A structure of the Ministry of Defence, it has existed under various names and subordinate to various institutions since 1 August 1914 (in practice since 4 July 1916).

It consists of 5,000 m2 of indoor and 40,000 m2 outdoor (of which 500 m2 covered) exhibition area, changing exhibits,[1] a library and a computer centre.

The NMMH was established in 1916, two years after a military-historical commission, consisting of an archive, exhibition and library, was founded.

By that time it was one of only three Bulgarian museums in existence.