WHEEL SUPPORT MECHANISM

To provide a wheel support mechanism which can realize the reduction of a weight of the wheel support mechanism by decreasing a thickness of a wheel even in a state where a hub and the wheel are provided as separate bodies and a brake disc is supported on the wheel. A wheel support mechanism (60) includes: a hub (81) supported on an axle (62); a wheel (91) supported on the hub (81); and a brake disc (73) supported on the wheel (91), wherein the wheel (91) is fastened to the hub (81) by a hub fastening member (83), and the brake disc (73) is fastened to the wheel (91) by a disc fastening member (96) at a position outside the hub fastening member (83) in a radial direction of the wheel (91).