To provide a wheel of which irregular rotation and the like are not generated, manufacture is easy, and the price is low, by integratedly forming the whole body extending from a boss part to a rim part on the outer circumference side out of light metal, and providing a penetrating part for mounting a bearing and an axle on the boss part.

This wheel 1 is provided with a plurality of arms 3 extending from a boss art 2 to the outer circumference side, and an annular rim part 4 held with these arms 3 on the outer circumference, and the whole body is integratedly formed out of light metal. The boss part 2 is formed with a through part 5 penetrating through the center part, composed of large diameter parts 5a provided on the opening part side of both ends and a small diameter part 5b provided between the large diameter parts 5a, bearings 7, 7 are fitted in both end parts of the large diameter parts 5a without play, nut members 9, 9 are fitted to both end parts of the small diameter part 5b for supporting the bearings 7, 7 so as not to slip out, and an axle 8 extending between the mutual bearings 7, 7 is insertedly fitted so as to spacedly hold the nut members 9, 9 in a fixed distance.