Sintered body and method for producing same

Provided are: a sintered body having both excellent mechanical strength and light transmittance; and at least one of a method for producing the sintered body. Provided is a sintered body having, as a matrix, zirconium oxide in which a stabilizing element and lanthanum are dissolved in a solid state, the cubic crystal ratio being 95% or more, and the content of the stabilizing element being 8-12 mol%. 本发明提供兼具优异的机械强度和透光性的烧结体及其制造方法中的至少一种。一种烧结体，其以氧化锆为基体，所述氧化锆固溶有稳定化元素和镧，且立方晶率为95％以上，所述稳定化元素的含量为8mol％以上且12mol％以下。