To provide a paper cup integrated with a lid, which is improved by solving the problem of a plastic lid and the drawback of an existing paper lid.

A disk-shaped lid 2 is projectingly formed on one side of the upper end of a cup cylindrical body 1. A curling edge 4, which is usually curled and formed outwardly of the upper end of a cylindrical body so that a lid lies on it when a lid is closed, is curled inwardly of the cylindrical body 1 so that a peripheral edge of the lid lies on a lower part of the inside of the curling edge to be fitted thereto when the lid is closed. Further, a cross-shaped cut and open portion is formed on the upper side of the lid, thereby making it easy to insert a straw therethrough and drink the contents.