The Rufous-bellied Antwren (Myrmotherula guttata) is a species of bird in the Thamnophilidae family. It is found in Brazil, French Guiana, Guyana, Suriname, and Venezuela. The bird's range is in the entire north of the Amazon Basin, from Venezuela in the west to the Brazilian state of Amapá to the east, but is not found south of the Amazon River.

Its natural habitat is subtropical or tropical moist lowland forests.