The Diamantina tapaculo (Scytalopus diamantinensis) is a species of bird in the Rhinocryptidae family. It was described as a new species in 2007, and is endemic to Chapada Diamantina in Bahia, Brazil. In the same region, another species, the Sincorá antwren, was described in 2007. The Diamantina tapaculo is closely related to the very similar Espinhaço tapaculo and Planalto tapaculo. The three differ mainly by their calls.