A wheel test device comprising: a rail wheel support unit configured to rotatably support a rail wheel (R); a wheel support unit configured to rotatably support a test wheel (W) in a state where the test wheel is in contact with the rail wheel (R); a first electric motor configured to rotate the rail wheel (R) and the test wheel (W); power distributing means configured to distribute power generated by the first electric motor to the rail wheel (R) and the test wheel (W); the wheel test device characterised in that it further comprises: a torque generating device configured to generate torque to be applied to the test wheel (W), wherein the torque generating device includes: a rotating frame rotationally driven by the first electric motor ; and a second electric motor mounted on the rotating frame , wherein at least one of the rail wheel (R) and the test wheel (W) is connected to the first electric motor via the torque generating device , wherein the rail wheel (R) and the test wheel (W) are configured to rotate in opposite directions at substantially the same peripheral speed when the operation of the second electric motor is stopped, and wherein a rated output of the second electric motor is equal to or more than 3 kW, and moment of inertia of a rotating part of the second electric motor is equal to or less than 0.01 kg· m 2 . a rail wheel support unit configured to rotatably support a rail wheel (R); a wheel support unit configured to rotatably support a test wheel (W) in a state where the test wheel is in contact with the rail wheel (R); a first electric motor configured to rotate the rail wheel (R) and the test wheel (W); power distributing means configured to distribute power generated by the first electric motor to the rail wheel (R) and the test wheel (W); the wheel test device characterised in that it further comprises: a torque generating device configured to generate torque to be applied to the test wheel (W), wherein the torque generating device includes: a rotating frame rotationally driven by the first electric motor ; and a second electric motor mounted on the rotating frame , wherein at least one of the rail wheel (R) and the test wheel (W) is connected to the first electric motor via the torque generating device , wherein the rail wheel (R) and the test wheel (W) are configured to rotate in opposite directions at substantially the same peripheral speed when the operation of the second electric motor is stopped, and wherein a rated output of the second electric motor is equal to or more than 3 kW, and moment of inertia of a rotating part of the second electric motor is equal to or less than 0.01 kg· m 2 . a torque generating device configured to generate torque to be applied to the test wheel (W), wherein the torque generating device includes: a rotating frame rotationally driven by the first electric motor ; and a second electric motor mounted on the rotating frame , a rotating frame rotationally driven by the first electric motor ; and a second electric motor mounted on the rotating frame , wherein at least one of the rail wheel (R) and the test wheel (W) is connected to the first electric motor via the torque generating device , wherein the rail wheel (R) and the test wheel (W) are configured to rotate in opposite directions at substantially the same peripheral speed when the operation of the second electric motor is stopped, and wherein a rated output of the second electric motor is equal to or more than 3 kW, and moment of inertia of a rotating part of the second electric motor is equal to or less than 0.01 kg· m 2 . <EOS>