PURPOSE: To provide excellent wear resistance and toughness to a titled sintered body by using the carbide, nitride, and carbonitride of the groups 4a, 5a, 6a of periodic table, Al compd., Cu and ferrous metallic compd. as a binder for cubic type boron nitride.

CONSTITUTION: The bond phase of a high-hardness sintered body is composed, by volumetric %, of 30W80 high-pressure phase type boron nitride and the balance 1 or ≥2 kinds among the carbide, nitride, and carbonitride of the groups 4a, 5a, 6a of periodic table, and the Al compd. The content of Al in the bond phase is adjusted to 5W30wt% and the content of the Cu and ferrous element to 1W20wt%. An intermediate joint layer is composed, by volumetric %, of <80 high-pressure phase type boron nitride and the balance 1 or ≥2 kinds among the carbide, nitride, and carbonitride of Ti, Zr, and Hf of the group 4a of periodic table. Al or Si is incorporated therein at ≥0.1wt%. The high- hardness sintered body is joined to a sintered hard alloy base metal and the high-hardness sintered body for tools is thus obtd.