To provide a zirconia workpiece for dentistry cutting in which a special sintering method such as HIP treatment is not required, and the color tone reproducibility similar to natural teeth and high strength can be imparted to a zirconia perfect sintered body.SOLUTION: A zirconia workpiece for dentistry cutting is configured as follows: layers LA and LB contained in sections A and B to 40% of a face-to-face distance from two parallel planes satisfy following expressions (1) and (2); the contrast ratios CA and CB in the specimen thickness of 1 mm of the sintered bodies SA and SB at 1550°C of test pieces being cut out of the layers LA and LB satisfy the following expression (3); and the change direction of the yttria concentration, the alumina concentration and the contrast ratio comprises two unchanged intermediate layer toward a laminating direction between the layers LA and LB. The expression (1) of the yttria concentration: layer LA-layer LB>1.0 mol%. The expression (2) of the alumina concentration: 0.0 wt%