PROBLEM TO BE SOLVED: To provide a cardboard box for packaging which has no fear of toxic combustion gas, does not lower the sealability of a flap, is not low in strength, does not swing the whole cardboard box, does not hurt a hand of a worker, and is not bad in the workability of a packaging work and stacking work.;SOLUTION: The outer flaps 5b which are extended from a box 1 body are folded over at the center part of the box and become a double structure, and handles 15 are integrally formed in the upper side parts. The formation is made by folding the upper side part 13 of the flap having the double structure at three parallel broken lines L. When the both handles are fallen down on the center side, the tips of the both handles contact to each other and have sufficient length to form an isosceles triangle. At the same time, before the both handles are used, they are in a fallen down state, have the length not projecting outside the box, and are adhered on the cardboard body with a particular two-sided tape which has a property not having an adhesive property when once taken off. A hole of the handle is formed by making a cutting line leaving the upper part 19 of the whole periphery of the hole and folding it over.;COPYRIGHT: (C)2003,JPO
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