A wheel including a rim member (20), and a hub member (22) which is connected to a center of the rim member via a wheel part (21). The wheel is rotatably connected to a chair part (1). The wheel fixes a cushion ring 26 on the outer periphery of the rim member (20), and has a continuous wall portion (31) on an outside portion of the outer periphery. The continuous wall portion (31) is shaped in form of a ring along the rim member (20), and provides a grip ring (27) on an edge portion thereof. The wheel provides a finger-holding cavity (32) which is formed by the continuous wall portion (31).