To prevent the parallelism of a pair of mutually opposing pressing die parts of a movable die from being spoiled, and at the same time, to provide a manufacturing method for forming the movable die which can be applied to many kinds of strip materials with different thicknesses.

The intermediate part in the axial direction of a metallic cylindrical material is removed in a recessing form at both side parts in its diameter direction. A pair of arcuate parts 12, 13 is formed in a state that one end edge parts in its circumferential direction are opposed each other apart at a prescribed interval. And at the same time, annular parts 14, 15 are located integrally with the arcuate parts 12, 13 at the end parts on both sides in the axial direction of the arcuate parts 12, 13. The opposing edge parts of a pair of the oppositely arranged arcuate parts 12, 13 are made as the pressing die parts 16, 17, and at the same time, the gap between the opposing edge parts is formed as the insertion gap of a plate material.