To provide a powder sintering shaping method for reducing the time required for shaping and breakout while maintaining low internal stress between thin layers.

The powder sintering molding method of sintering and laminating thin layers 8a of powder material to prepare a three-dimensional shaped material includes: selectively heating and sintering the thin layers for each one thin layer 8a; and cooling thin layers before forming an additional thin layer 8a of powdery material on the sintered thin layer 8b for each one sintered thin layer 8b or each of a plurality of sintered thin layers 8b.