SUNSHADE DEVICE

A sunshade device serves to shield a window with a shade drawn through a slit formed in a window peripheral member. The sunshade device includes: a windup device including a windup shaft supported so as to rotate about an axis; a shade including a short side edge and a long side edge opposed to each other and configured to be drawn from and housed in the windup device through the slit, the long side edge being attached to the windup shaft; a stay attached to the short side edge of the shade; a cover body configured to, on the housing side with respect to the slit, operate switching between a closed state of partially covering the slit and an open state of opening the slit and cover, in the closed state, the slit together with the stay in the state in which the shade is housed; and an associating mechanism operating the cover body to switch between the closed state and the open state in association with the movement of the stay such that the cover body enters the closed state in the state in which the shade is housed.