In the present invention, a lid reliably closes a container body and prevents accidental opening. A packaging container comprises a container body and a lid. The container body has a bottom face, a wall face that rises up from the periphery of the bottom face, and a lid-fitting flange that faces to the outside with respect to the wall face, and is provided with a reverse tapered face from the lid-fitting flange via a rounded portion. The lid has a top plate, a lid wall that is continuous from the periphery of the top plate in the downward direction, and a lid flange that expands outward from the lower edge of the lid wall, and is provided with a lid reverse tapered face that extends from the lid flange via a lid rounded portion. The depth of the reverse tapered face and the depth D of thelid reverse tapered face are the same.