The purple-throated cotinga (Porphyrolaema porphyrolaema) is a species of bird in the cotinga family, Cotingidae. It is found in the western Amazon rainforest of South America; its range extends from southern Colombia south through eastern Ecuador and Peru and east through extreme northwestern Bolivia and into western Amazonian Brazil. It lives in the canopy or along the borders of humid forest throughout its range. The purple-throated cotinga is monotypic within the genus Porphyrolaema and has no known subspecies. It is one of the smaller cotinga species and expresses strong sexual dimorphism. Males have black upperparts with a bold white wingstripe and white edges to the tertial feathers and a white belly with some black barring on the rear flanks. The throat is a deep purple, giving the bird both its common and scientific names. Females are dark brown with pale buffy margins on the upperparts, buffy cinnamon with black barring on the underparts, and rufous on the throat. The male has a powerful voice.

Little research has been done on this species, and not much is known about its ecology. The purple-throated cotinga is primarily frugivorous, although it does occasionally eat small insects. A solitary male attracts a female by perching in the canopy and letting the sunlight reflect off its iridescent feathers. It is suspected to breed year-round and is non-migratory. Despite being considered naturally uncommon or rare across its vast range, the purple-throated cotinga is listed as a species of Least Concern.