The ratchet-tailed treepie (Temnurus temnurus) is a species of bird in the crow and jay family Corvidae. The species is also known as the notch-tailed treepie. It is monotypic within the genus Temnurus.
The species has a disjunct distribution in Southeast Asia and China. One population is found in southern Thailand, another in southern Vietnam, another in central and northern Vietnam and Laos, and the last in Hainan in China. Its natural habitat tropical moist broadleaf evergreen lowland forests, and secondary forest and scrubland.