A kind of zirconia sintered body is provided, with improved intensity, in laminated multi-layer powder. Multiple Zirconium powders are formed to have difference and have contained the stabiliser compositions of zirconium oxide and for inhibiting phase shift zirconium oxide, zirconia composition is laminated and forms multiple Zirconium oxide powders, sintered zirconia composition is produced by with zirconia sintered body, bending strength, its material is big for 1100MP or more, measure in accords with JISR 1601, wherein multiple Zirconium powder test specimens are crossed along load application direction, the three point bending test of load(ing) point being aligned and boundary position in sintered body sample boundary.
