A disk player having a self-compensating dynamic balancer (400) which can limit internal vibrations generated by an eccentric center of gravity of a disk, and a turntable (200), a clamper (300) and a spindle motor (100) which incorporate the self-compensating dynamic balancer (400), are disclosed. The self-compensating dynamic balancer (400) includes at least one race (450) which is integrally formed with members (100,200,300) of the disk player, and a mobile unit including a plurality of rigid bodies (430) and/or a fluid (440) is located in the race (450) to be capable of moving, and a cover member (413) to cover an opening of the race. Thus, internal vibrations occurring due to an eccentric center of gravity of a disk (1) can be effectively limited by the self-compensating dynamic balancer (400) in which the mobile unit (420) is to move away from the center of orbital rotation by a centrifugal force during rotation thereof.