PURPOSE: To increase packing work efficiency and reduce packing material cost.

CONSTITUTION: In this packing method, a triangular packing article (A) is wrapped by a sheet of square plastic film material 11. Two triangular faces 1, 2 of a packing article are directed to both sides and the tops 6 of both faces are positioned on the diagonal line of the sheet member and the packing article is placed in the middle of the sheet material. The outerside parts of both faces 1, 2 of the sheet material are raised along the sides and these raised pieces 14, 15 are folded on the square faces 4, 5 of the front and rear parts of the packing article. And the respective bases of both folded tongue pieces 16 formed at the upper edge of packing article and folded pieces 17, 18 formed at the lower edge of the faces 4, 5 are heat-sealed in the folding process. And the folded and superimposed parts of both raised pieces are heat-sealed to pack the article.