The Cinnamon-bellied Ground-tyrant (Muscisaxicola capistratus) is a species of bird in the Tyrannidae family, the tyrant flycatchers.

It is found in western Argentina, eastern Andean Chile, southwest Bolivia, and southern Peru. Its natural habitat is temperate grassland.

The Cinnamon-bellied Ground-tyrant breeds in extreme southern Argentina and Chile, and northern Tierra del Fuego, and migrates north in the austral winter.