The Great-billed Hermit (Phaethornis malaris) is a species of hummingbird in the Trochilidae family. It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Peru, Suriname, and Venezuela. Its natural habitat is subtropical or tropical moist lowland forests.

The taxonomy of this species and the Long-tailed Hermit is confusing. Most taxa previously consider subspecies of the latter (insolitus, moorei, ochraceiventris, bolivianus and margarettae) are now considered subspecies of the former. A satisfactory taxonomic treatment of the entire P. longirostris/P. superciliosus/P. malaris group is still lacking according to some Neotropical ornithologists. Additionally, the taxon margarettae of the Atlantic forest of eastern Brazil is sometimes considered a separate species: Margaretta's Hermit (P. margarettae).