To provide a wheel spacer for an automobile capable of improving visibility and a decorative property from a vehicle side surface at night, by providing bright light emitting design at a uniform angle even in low speed travel without depending on an afterimage effect by illuminating a wheel peripheral part by emitting light while using an existing wheel in an automobile.

This automobile wheel spacer has a board-like fixing part 1 installed by being sandwiched between the wheel for installing a tire and a vehicle body side wheel installing part, and has a flange 2 overhanging in the outer diameter direction from this part, and a light emitting means 3 comprises any means by an electric or luminous function or a fluorescent emission function or having a light emitting function by combining these in this part.