The present invention provides an opening and closing body, which can restrain an inversion position relationship between two opening/closing positions of a movable panel and a sunshade part at any opening/closing position between a full-cut off state and a full-open state. A CPU (21)drives and controls a panel driving motor (26) based on a rotation position of the panel driving motor (26) detected by a pulse sensor (28) and the rotation position of the panel driving motor (26) detected by a pulse sensor (38), so that at the opening/closing position, the sunshade (16) moving firstly and the followed movable panel (15) approach a predetermined separation distance, the opening/closing operations of the followed movable panel are stopped.