PROBLEM TO BE SOLVED: To manufacture a packaging case to be assembled simply of which peripheral wall corners are formed obliquely into chamfered shapes in the packaged state. ;SOLUTION: Strong rule lines 8 to be bent easily and weak rule lines 9 harder to be bent than the strong rule lines are formed in parallel on respective corners of peripheral walls 2 rising from a bottom wall 1, and when the peripheral wall 2 is pushed out of the inner side in the state of being folded squarely along the strong rule line 8, respective corners of the peripheral wall 2 are bent to the obtuse angle along the strong rule line 8 and the weak rule line 9 are formed obliquely into the chamfered shape. The packaging case can be assembled simply by a conventional packaging machine, and packaging can be carried out efficiently at a low cost.;COPYRIGHT: (C)2000,JPO
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