To provide a method for producing a ceramic sintered compact having a high production yield.

In this method for producing a ceramic sintered compact by adding a binder to raw material powder, molding, degreasing and sintering, the temperature raising and lowering rate in the degreasing process is made ≤2 [°C/hour]. The degreasing is carried out in the atmosphere or in an oxidizing atmosphere. The binder is a polyvinyl alcohol or a paraffin and the degreasing temperature is 400-500 [°C]. The molding product is substantially composed of zinc, aluminum and oxygen or strontium, titanium and oxygen or strontium, barium, titanium and oxygen or strontium, bismuth, tantalum and oxygen or indium, tin and oxygen.