To provide a wheel for mounting a tire and adjusting gas pressure inside the tire without supplying gas from the outside.

One or more hollow parts are provided on the wheel. At least one of them is structured to be a sealed part. Internal pressure of the sealed part is set to be higher than pressure inside the tire and gas at high pressure is supplied to the inside of the tire. The sealed part is structured by hollowing a spoke part or forming a hollow part in a rim part. For example, spoke sealed parts 4 are provided to four spokes of the wheel 1, an gas passage 12 and an opening part 13 for passing through to a sealed part 5 of the tire are provided to one spoke, and the sealed parts are communicated with each other through a direction selector valve. An air valve 10 for injecting compressed air into each of the sealed parts is provided on an end part of the direction selector valve. In increasing pressure in the tire, the spoke sealed parts are communicated with the gas passage through the direction selector valve, and gas at high pressure is injected into the inside of the tire by the difference in air pressure.