The rufous-necked puffbird (Malacoptila rufa) is a species of near-passerine bird in the family Bucconidae, the puffbirds, nunlets, and nunbirds. It is found in Bolivia, Brazil, and Peru.

The rufous-necked puffbird is about 18 cm (7.1 in) long and weighs about 39 to 46 g (1.4 to 1.6 oz). It is somewhat unusual for a puffbird because it is unstreaked. The nominate subspecies' crown and cheeks are dark gray with narrow pale streaks and there is a large rufous loral spot. The nape has a wide rufous collar that extends onto the sides of the neck. The back is dark brown and the wings and tail a warmer brown. The underparts are shades of brown, darker on the breast and paler on the belly. The upper breast has a white crescent with a thin black border under it. The bill is blue-gray to black, the eye dark brown or dark red, and the feet pale gray-brown to pale olive-gray. M. r. brunnescens is very similar to the nominate, differing mainly in the intensity of the colors.