A spindle motor is disclosed, the spindle motor including a case including a lateral wall unit formed with a hollow hole, and a support unit extended to an inner side of a distal end of the lateral wall unit, a clamper arranged inside the lateral wall unit and supported by the support unit for clamping an upper surface of the optical disc, a cover plate covering the clamper, and an elastic member interposed between the clamper and the cover plate to apply a pressure to the clamper to a direction facing the upper surface of the optical disc.