The purpose of the present invention is use a simple structure to minimize high-order resonance of a turbine rotor blade without increasing device size in a turbine rotor blade for a radial turbine, particularly in a variable capacity turbine that is equipped with a variable nozzle. Provided is a turbine rotor blade for a radial turbine that is characterized by: the provision of a plurality of turbine rotor blades (3) on a hub surface; each of the turbine rotor blades (3) comprising blade thickness-changing sections (41, 42) in which at least the blade thickness of the cross-sectional shape in an intermediate section (3e) of the blade height increases abruptly with respect to the front edge-side blade thickness (t1) at a predetermined position from the front edge along the blade length that follows gas flow from the front edge (3a) to the rear edge (3b) thereof; and by the blade thickness increasing to a blade thickness (t2) via the blade thickness-changing sections.