To provide a wheel supporting structure capable of preventing the intrusion of water or the like into an area between a hub and a hub bearing, and an area between an outer ring and an inner ring of the hub bearing.

The wheel supporting structure provided with: a hub 4 which is fitted to an axle and integrally rotates with a wheel; a hub bearing 9 which is disposed at the outer periphery of the hub; and a knuckle 10 which rotatably supports the hub 4 through the hub bearing 9 wherein the hub bearing 9 has a bearing inner ring 9b which is fixed to the outer periphery face of the hub, and a bearing outer ring 9a whose outer periphery face is fixed to the inner periphery face of the knuckle 10, comprises: a first seal member 114 which is disposed in a path from the outside to the hub and the hub bearing; and a second seal member 113 which is disposed in a path from the first seal member to an area between the bearing outer ring 9a and the bearing inner ring 9b on the vehicle inside the hub bearing 9.