The utility model discloses a paper container, including cup, bottom of cup, rim of a cup, hemming opening, cup upper portion is the rim of a cup, and the cup lower part is the bottom of cup, and thecup is served as reasons four faces and is enclosed and close the square structure that forms, four faces are the arcwall face, and through the round -corner edge transition, rim of a cup department is equipped with hemming opening between each looks proximal surface, paper container's rim of a cup is circular structure, the bottom of cup square structure that four bottom of cup limits constituteof serving as reasons, the bottom of cup limit is the arc limit, and through round -corner edge transition between the adjacent bottom of cup limit, the cup is from the circular structure of rim of acup gradually to the square structure transition of bottom of cup, paper container's the rim of a cup square structure that four rim of a cup limits constitute of serving as reasons, the rim of a cuplimit is the arc limit, and through round -corner edge transition between the adjacent rim of a cup limit, the bottom of cup be circular structure, and the square structure of cup follow rim of a cupis gradually to the circular structure transition of bottom of cup. The paper container cup be the square structure of whole circular arcs transition, difficult outer spattering when empting liquid, it is better to hold the comfort level.