To measure shaft right-angled load of a wheel while facilitating machining of a shaft part and a support cylinder and assembling work, in a device for measuring the shaft right-angled load of the wheel attaching a detection part for measuring load acting on a shaft part in a shaft right-angled direction by providing the part to be detected on the outer periphery of the shaft part provided integrally on a hub coupled coaxially to the wheel, interposing a ball bearing between a part to be detected and the shaft part, surrounding the shaft part, and detecting the part to be detected to a cylindrical support cylinder part supported on a vehicle body side.

The device for measuring the shaft right-angled load of the wheel is provided with the part to be detected 18 on the outer periphery of the end of the shaft part 1a of the reverse side to the wheel WD concerning the ball bearings 8 and 9.