To provide a pressure sintering device that manufactures a high luminance luminous material excellent in afterglow property.

The pressure sintering device includes a mold consisting of a punch and a die, wherein the punch and die make tungsten or molybdenum a material thereof, further the division ring making tungsten or molybdenum a material thereof is arranged in the inside of the die. As the division ring, the quartered ring like Figure 6 is used. It is possible to take out a product from the mold without destroying the same by using such a division ring.