PACKAGING BOX AND METHOD OF SEPARATING BONDED PORTION THEREOF

To provide a packaging box improved in the workability to separate two plate portions bonded.SOLUTION: A packaging box 10 comprises: a first plate portion 21 that extends in a first direction X and a second direction Y; a second plate portion 22 that extends in the first direction X and a third direction Z; an inner plate portion 41 that continues to an end in the first direction X of the first plate portion 21 through a first bend 46; an outer plate portion 42 that continues to an end in the first direction X of the second plate portion 22 through a second bend 47 and arranged outer in the first direction X relatively to the inner plate portion 41; a bonded portion 15 that bonds the inner plate portion 41 and the outer plate portion 42 together; and a bend line 55 that is provided in the inner plate portion 41. The bend line 55 partially lies on the bonded portion 15 or in the vicinity of the bonded portion 15 and inclines toward the second bend 47 from a tip end 41a side of the inner plate portion 41 in the third direction Z toward the first bend 46 side.SELECTED DRAWING: Figure 2 【課題】包装箱における貼着された２枚の板部の分離作業性を向上する。【解決手段】包装箱１０は、第１方向Ｘ及び第２方向Ｙに延びる第１板部２１と、第１方向Ｘ及び第３方向Ｚに延びる第２板部２２と、第１板部２１の第１方向Ｘの端に第１折曲部４６を介して連なる内板部４１と、第２板部２２の第１方向Ｘの端に第２折曲部４７連なり、内板部４１に対して第１方向Ｘの外面側に配置された外板部４２と、内板部４１と外板部４２を貼着する貼着部１５と、内板部４１に設けられた折曲線５５とを備える。折曲線５５は、貼着部１５上又は貼着部１５付近に一部が位置し、第３方向Ｚにおける内板部４１の先端４１ａ側から第１折曲部４６側に向けて第２折曲部４７側へ傾斜している。【選択図】図２