Patent ID: 8418878

Claim:
A packaging container comprising: a pair of cover members attached to each other to form a housing space for accommodating an article therein; each cover member includes a peripheral portion, where the peripheral portion of each cover member engages one another, wherein: at least one of the pair of cover members is integrally molded from a sheet-shaped plastic; the at least one of the pair of cover members includes an opening portion at one part thereof facing the housing space, the opening portion being surrounded by an opening assisting line portion formed in a linear form and located radially inwardly from the peripheral portion, and being opened by tearing the opening assisting line portion when the packaging container is opened; the opening assisting line portion has a plurality of recesses formed thereon and aligned in an extension direction of the opening assisting line portion, each of the plurality of recesses not piercing through the at least one of the pair of cover members and thereby forming a substantially flat bottom surface within each such recess.