The Blackish Antbird is found in the Guianas and in the Amazon Basin, mainly south of the Amazon and into Colombia, Ecuador, Peru and Bolivia. See the distribution map at Birdlife International.

The male is slaty grey with white at the bend of the wing and small white fringes to the wing coverts forming a wing-bar. It has no white on the tail.

It is usually in pairs in dense undergrowth or thickets at forest edges mainly in várzea forest.