An object of the present invention is to enable easy and easy peeling and unsealing of the detachably attached portions in the peeling region of the inner member and the outer member, and the contents enclosed in the package body between the members. It is an object of the present invention to provide a peel-open package that can be smoothly taken out from the peel-opened portion, and an open structure of the peel-open package. A sheet member 20 in which a lid portion 13 of a peel-open packaging body 10A is disposed on a side corresponding to a storage portion 14 of a packaging body 11, and a film member 30 bonded to the surface side of the sheet member 20 are provided. The notches 21 and 31 penetrating in the thickness direction T of the members 20 and 30 intersect the longitudinal direction L in the peeling region 16 set in the bent portion 15 of the members 20 and 30, and They are arranged at a predetermined interval with respect to the direction L. The opposing surfaces in the peeling region 16 corresponding to the space between the notches 21 and 31 in the members 20 and 30 are pasted to each other by the adhesive layer N1. [Selection] Figure 2
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