The Rio Branco Antbird (Cercomacra carbonaria) is a bird species in the family Thamnophilidae. It is found in Brazil and Guyana.

Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist shrubland. It is becoming rare due to habitat loss.

It was formerly classified as a Vulnerable species by the IUCN. But new research has shown it to be not as rare as it was believed. Consequently, it is downlisted to Near Threatened status in 2008.