To simply crush a used box into a flattened shape with one touch.SOLUTION: This box C1 is provided with disassembling function parts 15D, 16D which comprise on two side boards 15, 16 cut lines d2 extending from both ends of end edge parts of a bottom surface board 12 of each of the side boards 15, 16 toward an end edge part of a top surface board 14 in an approximate triangle shape, and in the center of width direction of the bottom surface board 12 is provided a disassembling function part 12D which comprises a cut line d2 extending linearly toward the center of the disassembling function parts 15D, 16D of each of the side boards 15, 16, and by pressing from a front board 11 toward a back board 13 or vice versa, the box C1 is crushed into a flattened shape.SELECTED DRAWING: Figure 4【課題】使用済みになった箱をワンタッチで簡単に扁平状に押し潰せるようにする。【解決手段】この箱Ｃ１は、両側面板１５、１６に各側面板１５、１６の底面板１２側の端縁部の両端から天面板１４側の端縁部に向けて略三角形状に延びる切り込み線ｄ２からなる解体機能部１５Ｄ、１６Ｄを付設され、底面板１２の幅方向中央に各側面板１５、１６の解体機能部１５Ｄ、１６Ｄの中央に向けて直線状に延びる切り込み線ｄ２からなる解体機能部１２Ｄを付設されて、正面板１１から背面板１３に向けて又はその反対に圧することにより、箱Ｃ１を扁平状に圧潰するようにした。【選択図】図４
