Peel-openable package and opening structure for peel-openable package

An opening structure for a peel-openable package, the opening structure being usable to peel a part of a package main body having a content enclosed therein to open the package main body, at least a part of the package main body including:

• an inner member located at a position corresponding to an inner portion of the package main body;
• and
• an outer member bonded to a surface of the inner member, the surface corresponding to an outer portion of the package main body;
• wherein:
• the inner member and the outer member have a foldable portion in an area thereof where the inner member and the outer member are bonded together;
• the foldable portion includes a peel region where the inner member and the outer member are allowed to be peeled off from each other;
• the foldable portion include a cutout, in the peel region, in each of the inner member and the outer member, the cutouts extending so as to cross a direction corresponding to a folding direction in which the foldable portion is folded, and the cutouts each being formed into an opening running in a thickness direction when the foldable portion is folded;
• the cutout formed in the inner member and the output formed in the outer member are away from each other by a predetermined interval, the predetermined interval extending in the direction corresponding to the folding direction;
• and
• an adhesive layer is provided between facing surfaces of the inner member and the outer member facing each other, the facing surfaces being defined in at least the peel region, the adhesive layer bonding the facing surfaces together such that the facing surfaces are peelable from each other.