PURPOSE: To provide the cushion effect for a wheel itself by installing a plurality of coil springs in tension state in the radial direction between an outer wheel and an inner wheel and elastically supporting an axle and the inner wheel by the outer wheel through the coil springs.

CONSTITUTION: As for a transport vehicle for transporting a relatively light load, an axle for supporting wheels is directly installed on a car body, and an expensive cushion mechanism set between the axle and the car body is not installed. In such a transport vehicle, the wheel 1 is composed of an outer wheel 4 having a travelling tread surface 3 in contact with a traveling road surface 2 and an inner wheel 6 installed on a axle 5. A function part is constituted by installing a plurality of coil springs 9,... in tension state between the inner peripheral surface 7 of the outer wheel 4 and the outer peripheral surface 8 of the inner wheel 6. Accordingly, when a load W is applied onto the axle 5, the inner wheel 6 is elastically supported onto the outer wheel 4 by the upper and lower coil springs 9 and 9', and the cushion effect of the axle 5 can be secured.