So far, the tone and translucency same with the taste same with natural tooth, especially with natural tooth are not obtained yet, and there is high-intensitive zirconia sintered body. The high but also taste also excellent zirconia sintered body the purpose of the present invention is to provide not only intensity. The present invention provides a kind of coloring translucency zirconia sintered body, which is characterized in that it includes the brightness L* in the yttrium oxide of iron compound and 2~4mol%, L*a*b* colorimetric systems is 51 or more and 80 or less, relative density 99.80% or more. Total light transmittance of the colored zirconium oxide sintered body preferably under sample thickness 1mm, D65 light source is 20% or more. Coloring translucency zirconia sintered body of the invention is particularly suitable for the zirconia sintered body used in dental use, is further adapted for the grinding blank, orthodontic brackets such as denture material.
