To provide a sheet housing unit capable of preventing a driver from rolling down when spreading a sheet 14 to prevent the scatter of materials loaded on a dump truck and when housing the sheet 14.
A support 8, to which a bearing 5 is fitted to be unified, is symmetrically fitted to a rotary shaft 13 at two positions, and a handle 4 for rotating the rotary shaft 13 is fitted to both or any one of a right and a left ends of the rotary shaft 13, and the rotary shaft 13 is rotated by rotating the handle 4 to wind the sheet 14 around the rotary shaft 13. When spreading the sheet 14, a rope 20 with a hook is hooked on a hook holder 16 provided at a central part of a rear part of the sheet 14 when unwinding the sheet 14, and a ball 21 fitted to the rear end of the rope 20 with a hook is used to safely do the sheet covering work on the ground.