To pay attention to both side faces 15 of a packaged object 10 to improve packaging quality in packaging form.SOLUTION: First folding-in flaps 21 are folded toward both side faces 15 of a packaged object 10, respective side part folding-in flaps 22 are arranged inside surface flaps 23 at respective lug parts 20 of a packaging material 1, and the side part folding-in flaps 22 and surface flap 23 are folded toward both side faces 15 of the packaged object 10 such that both end edges 23a of the surface flap 23 are arranged to both end edges 15a of respective side faces of the packaged object 10, thereby forming a packaging form.SELECTED DRAWING: Figure 5

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