The present invention provides a zirconia sintered body containing a fluorescent agent and having excellent translucency and excellent strength. The present invention also provides a zirconia shaped body and a zirconia calcined body from which the zirconia sintered body can be obtained. The present invention relates to a zirconia sintered body comprising a fluorescent agent, wherein the zirconia sintered body comprises 4.5 to 9.0 mol% yttria, and has a crystal grain size of 180 nm or less, and a three-point flexural strength of 500 MPa or more. The present invention relates to a zirconia shaped body comprising a fluorescent agent, wherein the zirconia shaped body comprises 4.5 to 9.0 mol% yttria, and has a three-point flexural strength of 500 MPa or more after being sintered at 1,100°C for 2 hours under ordinary pressure, and a crystal grain size of 180 nm or less after being sintered at 1,100°C for 2 hours under ordinary pressure. The present invention relates to a zirconia calcined body comprising a fluorescent agent, wherein the zirconia calcined body comprises 4.5 to 9.0 mol% yttria, and has a three-point flexural strength of 500 MPa or more after being sintered at 1,100°C for 2 hours under ordinary pressure, and a crystal grain size of 180 nm or less after being sintered at 1,100°C for 2 hours under ordinary pressure.
