To provide a shelf board with simplified operation of placing a carry ing truck between shelf support frames.

A space between an inside projection 23 and an outside projection 24 provided on the lower surface of an edge cover member 22 of a shelf board 20 is formed to have a thickness integral multiple of the thickness of a cross member of a shelf support frame 14, and a guide stepped part 15 for the cross member and an engagement part 26 are provided on the lower surface portions of the cover member 22 positioned between the inside projection 23 and the outside projection 24. Thus, it is not necessary to align an engagement part 25 of the cover member 22 with the cross member of the shelf support frame, but the lower surface of the cover member 22 is just placed on the cross member to surely position the cross member between the inside projection 23 and the outside projection 24.