WINDOW SHADE DEVICE

Included are: a shade; a pair of rails disposed so as to have a gradually increasing spacing therebetween from a proximal end to a distal end thereof; a housing device disposed on the proximal end side, to which the shade is mounted so as to be drawn therefrom and housed therein; a drawing member that includes a plurality of shade support parts supporting a drawing-side edge of the shade at a plurality of positions in a width direction and is configured to become larger and smaller such that intervals of the plurality of shade support parts become larger and smaller in the width direction; and a pair of runners connected to the drawing member and configured to move along the pair of rails. The drawing member deforms to become larger and smaller as the pair of runners are guided by the pair of rails to move.