PURPOSE: To provide a producing method for a ceramic granulated powder capable of preventing the deterioration and hardening of a binder contained in a ceramic raw material slurry and obtaining the ceramic granulated powder excellent in compaction and a producing method for a ceramic sintered body little in defect by using the granulated powder.

CONSTITUTION: The uniform slurry is prepared by adding a sintering assistant, the binder and a dispersing agent into a ceramic raw material powder and mixing and by spray drying the obtained slurry in an evacuated vessel having a prescribed vacuum degree, the ceramic granulated powder 3a having a prescribed average particle diameter is formed. The ceramic sintered body is produced by producing the ceramic granulated powder 3a by the producing method and after the ceramic granulated powder 3a is compacted into a prescribed shape, sintering in an inert gas atmosphere.