To provide a packaging container which is attachable to and removable from a can type container and is tough against deformation or the like.

The packaging container has a bottom portion becoming a closure face, a circumferential portion formed in connection with the bottom portion, a mating portion formed in connection with the circumferential portion and mating with the upper end portion of the can type container such as a beer can or the like having a tapered end, and a side portion including the circumferential portion and the mating portion wherein the maximum diameter of the side portion is smaller than that of the can type vessel, a plurality of first reinforcing portions are mounted in the bottom side of the circumferential portion, and a plurality of second reinforcing portions are mounted at the position different in a direction of depth from the first reinforcing portions.