PURPOSE: To cover a car body easily and accurately by arranging a pair of long cylindrical bodies provided with moving and fixed hooks that can be freely separated from and linked with each other, on both ends of a sheet that covers the car body, and by hooking each hook on each hook stop arranged in front and back of the car body.

CONSTITUTION: Hook stops 3, 4 are arranged on the front and rear bampers 1, 2 and so on of an automobile. Sheet installation materials (s) are arranged on the front and rear ends of a sheet 20. A hard long cylindrical body formed of the same length as the width of the automobile is divided into (a) and (b), and their separated ends are hinged on each sheet installation material (s) by a hinge 6 provided with an engagement device. A slide groove 7 is formed on one long cylindrical body (a), and a moving hook 8 is inserted therein and is elastically held thereby, while a fixed hook 12 is fixed on the other long cylindrical body (b). By hooking the moving hook 8 and the fixed hook 12 on hook stops 3, 4, a car body is covered with the sheet 20, and the car body is protected thereby.