<p>Mounts (10) are provided on the inside surface of the left and the right sides of a seat cover (3) on the underside of a chair (1), and positioning pins (11) with heads and fastening members (12) are provided on the upper surfaces of the bases of armrests (2). Each mount (10) includes positioning holes (14) respectively having holes for the heads of the positioning pins (11) to be passed through and slits (14b) of a width allowing the rods of the positioning pins (11) to be fitted in, and a support hole (15) for the fastening member (12) to be engaged in. When the positioning pins (11) are located at the rear ends of the slits (14b) of the positioning holes, the armrests (2) is fixed to the mounts (10) through the support holes (15) by the fastening members (12). Thus the armrests (2) are removably, assembled with the chair body. <IMAGE></p>
