A storage structure for a cover member of a sliding roof type vehicle is equipped with a cover member (20) capable of open and close for covering the opening section formed in the roof of the vehicle, the first rails (13R, 13L) for guiding the opening or closing of the cover member (20) provided along the right and left sides of the opening section, a tray (30) for placing the cover member in folded state installed at the rear of the first rails, a holding means (50) for holding the tray (30) rotatably at a first position A, and a storage means (85) installed at the back of the last row of seat of the vehicle, wherein the storage means (85) is composed of a second rails (40) extending downward from the first position A and a storage box (80) provided on a vehicle deck connected to the second rails (40), and, with the folded cover member (20) placed on the tray (30), the tray (30) is rotated by the holding means (50), thereby the folded cover member (20) is stored by guiding the tray (30) to the second rails (40) and moving the second position B in the storage box (80).