To provide a storing bag capable of easily taking a content out even when the remaining amount of the content is reduced.

By approximately linearly tearing and cutting off the upper side part of the storing bag 10 at a first main notch 13a or a second main notch 13b as a starting point, a first opening can be performed, and additionally, a second opening can be performed by approximately linearly tearing and cutting off the right side part and the neighborhood part of the unsealed opening of the storing bag 10a as it remains bent by making a first sub-notch 13c and a second sub-notch 13d coincide with each other as a base point after the storing bag 10a is bent and piled up, so that the first sub-notch 13c of the storing bag 10a coincides with the second sub-notch 13d after the first opening operation is completed.