To provide a die almost free from the generation of a burr at a position corresponding to a pin, of a ball surface and free from a failure in the molding by comprising the pins of which the point parts made of a porous metallic material are exposed in a cavity, in a position where the gas in the cavity is discharged in the molding of a golf ball.

The die 1 comprises a separably bonded upper die 2 and a lower die 3, and a spherical cavity 4 is formed inside it. The support pins 6 for supporting a core 5, having the point parts made of a porous metallic material and exposed into the cavity 4 and a gas bent pin 10 are mounted in a position where the gas in the cavity 4 of the die 1 is discharged in the molding. Thereby, the degassing is performed through a number of holes of the pins 6, 10, so that the gaps between the pins 6, 10 and the accommodation holes 6a, 9a can be narrowed. As a result, the burr is hardly generated on the gaps between the pins 6, 10 and the pin accommodation holes 6a, 9 in the molding of a golf ball in the cavity 4.