Developed object for building packing box and the packing box

摘要

There is provided a packing box having a taking-out opening which can be opened with ease with only one hand. The developed object of packing box comprises: first strip foldable inwardly on fold lines arranged equidistantly and perpendicularly to strip lengthwise direction, for forming inner-lateral surface; second strip including three separate square bottom-boards continuous with first strip via fold lines; third strip continuous with central bottom-board via fold line and foldable inwardly on fold lines arranged equidistantly, for forming outer-lateral surface; and fourth strip continuous with third strip via fold line, in which buckling portions and upper lids are arranged alternately in lengthwise direction. Central buckling portion has square hole, and the width of the lid is larger than one-half of one side of bottom-board. One of the lids has a lid-cutting line formed in location that corresponds to square hole when one lid is inserted under the other.