To prevent corrosion from being generated and the durability of a wheel from being lowered as a result of a medium such as water or salt water entering the wheel when the wheel made of magnesium alloy is mounted on a vehicle.

A center hole 50 including a hub hole 17 has a waterproof structure to solve a problem. A member connected to the center hole 50 is provided with a sealing member or a liner 53 is provided in order to prevent contact corrosion when a wheel is mounted on a hub flange 2 and a hub 4. An elastic ring 21 is fitted to the peripheral surface of the boss part 20 of the liner 53 as a sealing member.