[Problems]To provide a wheel assembly allowing the elimination of an installation space for suspension element on the outside of a wheel and capable of satisfactorily damping and absorbing shock and vibration in the vertical direction. [Means for Solving Problems]Suspension element (70) is disposed, in a generally raised state, inside of a rim (11). The upper end of the suspension element (70) is connected to a first support member (50) mounted to a vehicle body. The lower end of the suspension element (70) is connected to a second support member (60) rotatably connected to the disk (12) on the wheel (10). The shock and vibration from the wheel (10) in the vertical direction are damped and absorbed by the suspension element (70). Also, a spring mechanism (30) and a flat bearing (40) are disposed in the wheel (10). The spring mechanism (30) is disposed between a rotating member (20) rotatably supported on the vehicle body and the rim (11) of the wheel (10). In the case the rotating member (20) is fixed to a brake drum, braking torque is transmitted to the wheel (10) through the spring mechanism (30). The flat bearing (40) is disposed between the rim (11) and the rotating member (20) and prohibits the axial movement of the wheel (10) relative to the vehicle body.