A sintered compact according to the present invention includes: a first material that is cubic boron nitride; a second material that is an oxide of zirconium; and a third material that is an oxide of aluminum, the second material including cubic ZrO 2 and ZrO, the third material including ±-Al 2 O 3 , and the sintered compact satisfying the following relation: 0.9 ‰¤ I zro 2 111 / I a 1 110 ‰¤ 30 ; and 0.3 ‰¤ I zro 111 / I a 1 110 ‰¤ 3 , where I a1 (110), I zro2 (111), and I zro (111) respectively represent X-ray diffraction intensities of a (110) plane of the ±-Al 2 O 3 , a (111) plane of the cubic ZrO 2 , and a (111) plane of the ZrO.