To improve the controllability and stability of a vehicle by sufficiently securing mounting rigidity between a light alloy wheel 3 and a hub 5.

A plurality of mounting holes 23 are formed on a wheel disc 9 in a perimeter direction at intervals, and fixing bolts 27 penetrating through the mounting holes 23 corresponding to wheel mounting parts 5, 7 are spaced in the perimeter direction. Pressurizing nuts 29 capable of pressurizing the wheel disc 9 toward the wheel mounting part 7 are screwed with tips of the fixing bolts 27, and depressions 31 are formed near peripheral edges of the mounting holes 23 on a joint face of the wheel disc 9 and/or near peripheral edges of the mounting holes 23 on the joint face of the wheel mounting part 7.