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

A plurality of mounting holes are formed on a wheel disc in a perimeter direction at intervals, and spacers 27 are arranged between a joint face of a wheel disc 9 and a joint face of a wheel mounting part 7. Through holes 31 are formed on the spacers 27 at positioned matched with the mounting holes 23, respectively. A plurality of fixing bolts 33 penetrating through the mounting holes 23 corresponding to the wheel mounting part 7 and the through holes 31 are spaced in the perimeter direction, and nuts 35 capable of pressurizing the wheel disc 9 toward the wheel mounting part 7 are screwed with tips of the fixing bolts 33. Depressions 37 are formed near peripheral edges of the through holes 31 on one side face and/or the other side face of the spacers 27.