To provide a heat resistant barrier cap with a pull-ring, which has a superior heat resistance, barrier property, and formability.

The cap is formed in such a manner that a lid 200 is connected to a cap body 100 in an openable/closable manner via a hinge 140, a spout cylinder 111 is erected on the top board 110 of the cap body, and a blocking board 130 is formed on the inner lower end of the spout cylinder, an annular incision 131 having a V-shaped vertical section is formed at an opening forming position on the upper surface of the blocking board to form a circular thin weakened line 132 on the under surface of the blocking board, and a pillar 133 having the pull-ring 134 on the front end thereof is erected at a prescribed position adjacent to and inside the circular incision on the blocking board upper surface. In addition, a laminated film 30 having heat resistance and barrier property is heat welded at least to the whole of the under surface of the blocking board by an insert injection molding method.