Abstract: There is provided an apparatus for shading inside of a car from the sun in summer, and preventing the windshield from being frozen due to frost or the like in winter. The apparatus is free from disadvantages of being blown away by the wind, being stolen, obstructing driver's sight at the time of driving the car or occupying a large space inside the car. The apparatus comprises a mounting plate located on reverse side of a bonnet; a cover capable of being unfolded and folded vertically. Accommodating holders are attached to the front end of the mounting board for accommodating the cover when folded. An elongated, flexible slide arm is fixed to a front end of the cover and is supported for performing freely reciprocating motion in longitudinal direction to move linearly along the external surface of the windshield and upper side of said mounting place. Arm drives are fixed to the mounting plate. A switch for driving the arm is located inside of the car.