The purpose of the present invention is to provide a cBN tool which can exhibit excellent chipping resistance and excellent wear resistance even when used for the intermittent cutting of a high-hardness steel and can also exhibit excellent cutting performance throughout long-term use. The purpose can be achieved by providing a cutting tool made from a cBN sintered material, in which a cBN sintered material that contains at least cBN particles as a hard phase component is employed as a tool base, wherein each of the cBN particles has an Al2O3 layer that has, on the surface thereof, slits formed at an average formation ratio of 0.02 to 0.20 inclusive and has an average layer thickness of 1.0 to 10 nm, the cBN sintered material has, around the periphery of each of the cBN particles, a binder phase comprising TiN alone or a combination of TiN and TiC, TiB2, TiCN, AlN, Al2O3, WC or the like, and the sum total of the content of Al2O3 formed on the surface of each of the cBN particles and the content of Al2O3 present in the binder phase is 2 to 40 vol% on average wherein the volume of a region of each of the cBN particles which lies between the surface of each of the cBN particles and a zone located at the depth of 50 nm from the above-mentioned surface is defined as 100 vol%.