To provide a packaging bag having a plurality of storage parts, which is compact and can be produced at a low cost.

A first storage part 4 is formed of a pair of side walls 2 comprising a totally flexible sheet member and of a bottom wall 3 having its lower side parts held so as to get nearer to/away from each other, while the residual space between the side walls 2 are used to constitute a second storage part 5 using the space between the lower side parts as an opening part 13. A first content 20 and a second content 21 are stored in the first storage part 4 and the second storage part 5, respectively.