Provided is a packaging container that simplifies the opening operation. The packaging container includes a front cover member and a back cover member, which are attached to each other to form a housing space for accommodating an article therein. The back cover member is integrally molded from a sheet-shaped plastic. The back cover member includes an opening portion, which is surrounded by an opening assisting line portion formed in a linear form and opened by tearing the opening assisting line portion when the packaging container is opened. The back cover member is formed so that its surface is recessed at the opening assisting line portion.