The white-bibbed antbird (Myrmoderus loricatus) is a species of passerine bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is endemic to Brazil.

The white-bibbed antbird is 14 to 15 cm (5.5 to 5.9 in) long. Adult males have a black crown with wide rufous-chestnut edges to the feathers. They have a long white supercilium on an otherwise mostly black face. Their upperparts and tail are mostly rufous-chestnut with a white patch between their scapulars. Their flight feathers are rufous-chestnut and their wing coverts black with wide white tips. Their chin is black. Their throat and underparts to the crissum are white with black scallops on the breast; their crissum is light ochre-brown. Adult females are similar to males but with a dark reddish yellow-brown crown, a pale buff supercilium, mostly plain white underparts, and pale buff flanks and crissum.