A control apparatus includes a first drive device driving a movable panel, a first detection device detecting a state of the movable panel, a second drive device driving a sunshade, a second detection device detecting a state of the sunshade, and a control device controlling one of the first and second drive devices to stop an operation of a succeeding member serving as one of the movable panel and the sunshade configured to be positioned behind a preceding member serving as the other of the movable panel and the sunshade relative to each of the opening position and the closing position, in a case where a distance between the movable panel and the sunshade becomes smaller than a predetermined distance on a basis of a position of the movable panel detected by the first drive device and a position of the sunshade detected by the second drive device.