PROBLEM TO BE SOLVED: To provide a packing bag for powder and granule of which the appearance is improved and the workability of boxing is enhanced.;SOLUTION: The packing bag 102 for the powder and the granule is flat in a folded state and has an opening section 10 in the upper section of a barrel 1 and is equipped with a chuck 3 in its opening section and is the packing bag which makes a gusset form only in the bottom 2 so that the bag can become independent when it becomes a solid shape by putting in contents. The barrel 1A is connected with the bottom 2 continuously, it is squeezed as it goes to an opening section 10 side, and it becomes thin, and it becomes the opening section 10, and the breadth a of the opening section 10 becomes a=K(b-2c) (where ; K=0.8 to 2.0) if the breadth of the bottom section B of a square shape in the bottom 2 is set to (b-2c).;COPYRIGHT: (C)2007,JPO&INPIT
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