To laminate a bottom edge part in a horizontal position so that the bottom edge part has the same thickness as both side parts to increase interior volume.

A medicine bag forms a front surface sheet 3 and a back surface sheet 4 by bending one sheet 6 so that it is folded along a bottom edge 7. Both-side edges of the front surface sheet 3 and the back surface sheet 4 are bonded by both-side bonding parts 1 to form a bag shape of which upper side is open. At the front surface sheet 3 and the back surface sheet 4, the inner surfaces thereof opposed to the bent bottom edge part are bonded by a bottom edge bonding part 2.