A box that has enhanced product package storing efficiency and that can display product packages stored inside. The box includes a box body and a cover that can open and close the upper surface opening of the box body. The box body has a front plate, a back plate, right and left side plate, a bottom plate that has a rectangular shape, and a storage space for a plurality of product packages arranged on both upper and lower levels by placing, on each product package that has been placed on the bottom plate, another product package. The front plate is capable of being tear-opened to form an opening that makes the stored product packages visible, and the opening is provided with a fall preventer that supports the front-most product package on the upper level and prevents it from falling from the opening.