The Defense Army of the Republic of Artsakh (, also Defense Army of the Republic of Nagorno-Karabakh), also known as Artsakh Defence Army (or Nagorno-Karabakh Defence Army) was the defence force of the breakaway Republic of Artsakh. Established in 1992, it united previously disorganized defence units which were formed in the early 1990s.

It was disbanded on 20 September 2023 under the terms of the Nagorno-Karabakh ceasefire agreement