Abstract: A car sunshade may include a supporting frame and a sunscreening fabric enclosed by the supporting frame. In one embodiment, the supporting frame of the car sunshade is made of a predetermined polygonal shape, depending on the shape of the car window. The supporting frame can be made by a resilient material, so it can be slightly bent to snap on the car window. The supporting frame may have an upper and a lower side, and the user can align and insert the lower side into the lower receiving groove, slightly bend the sunshade to insert the upper side into the upper receiving groove, and slight move the sunshade to the side groove. The sunscreening fabric can be extended and the sunshade can be perfectly secured in the frame of the car window without using any additional equipment, suction cups, or adhesive.