SUNSHADE DEVICE

It is aimed to enable a stay attached to an edge of a shade to change its position along with an operation of drawing/housing the shade without depending on a curved shape of a rail. A sunshade device includes a pair of rails disposed so as to have a gradually decreasing spacing therebetween, a windup device disposed between proximal ends of the pair of rails, a shade configured to be drawn from and housed in the windup device, a stay attached to a short side edge of the shade, a pair of shafts respectively inserted into the stay so as to move along a longitudinal direction thereof at both ends of the stay, and a pair of runners respectively provided so as to move along the pair of rails and coupled to the pair of shafts. Provided at least on one end side of the stay is a rotation mechanism causing the stay to change its position upon reception of a force by which the shafts move along the longitudinal direction of the stay as the pair of runners move along the pair of rails.