PURPOSE:To prevent the generation of a pinhole and to simplify manufacturing, by using upper and lower molds showing the predetermined shape of a pessary and forming an integrated shape, wherein a spiral ring is sealed in rubber equipped with a tab, by the press molding of rubber. CONSTITUTION:Upper and lower molds 3, 4 are split and weighed unvulcanized rubber B is placed at the top position of the lower mold 4 and a spiral ring 5 is engaged with the engaging round groove 6 at a mouth edge position to be set thereto. When upper and lower molds 3, 4 are set to a press machine to perform press molding, the unvulcanized rubber B of the top position A is pressed to flow in the entire region of the gap 2 between the split molds and formed into a pessary shape to be vulcanized. The rubber flows in the round groove 6 so as to cover the spiral ring 5 to become an integrated shape and the excessive rubber is stored in an unnecessary rubber eacape groove 7. Next, the burr of the unnecessary rubber B' expanding to the split surfaces of the press machine is removed. By this method, a pessary having a uniform film thickness and no pinhole can be prepared inexpensively.
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