To provide a covering device which continuously conceals the front part and the upper part of a display shelf without making merchandise on the top shelf board fall and makes customers visibly understand the end of sale of the merchandise.

A winding type roll screen 4 is provided at the lower part of the front end part of the bottom shelf board 3. A guide rod 11 which extends rightward and leftward and has both right and left end parts bent inward slightly outside both side ends of a screen 4a is tightly inserted in the drawing end part of the screen 4a. Screen supporting arms 12 extending to the front are provided at the upper end parts of both right and left supporting posts 2. The screen 4a pulled up to cover the front part of the shelf boards 3, 9 is pulled to the back by using the guide rod 11 as a supporting point to cover the upper part of the top shelf board 9 by locking both side end parts of the guide rod 11 with locking rods 15 provided at the front end parts of the screen supporting arms 12 and located ahead of the shelf boards 3, 9.