A sunshade device disposed in an opening of a vehicle includes a pair of winding devices, a sheet-like shade member wound in each of the winding devices and drawable therefrom; a frame member disposed at a draw-out end of each shade member so as to extend along an end edge thereof; and a sealing member that closes a portion between the draw-out ends of the side shade members in a closed-shade state where the draw-out ends of both shade members are abutted with each other in a substantial center of the opening of the vehicle. The frame of the other side shade member includes a hollow cross-sectional portion extending along the end edge of the draw-out end of the other side shade member, and the sealing member is brought into contact with the hollow cross-sectional portion.