To provide a ceramic tool consisting essentially of a Ti-based hard phase having excellent heat resistance and wear resistance, improved toughness, capable of cutting a hard iron-based material such as ductile cast iron, etc., at a high speed.

This ceramic tool comprises its main part composed of the following ceramic material. The ceramic material consists of a Ti carbonitride- based hard phase mainly constituted of Ti carbonitride and an alumina-based phase mainly constituted of alumina. When the weight content WA1203 of Al component calculated as Al2O3 is defined as an alumina weight content, the weight contents of a Ti component, a C component and an N component are defined as WTi, WC and WN and weight content WTiCN of the Ti carbonitride-based hard phase is defined as WTi+WC+WN, WA1203 is 10-45 wt.%, WTiCN is 51-89.5 wt.% and WA1203+WTiCN is 96-99.5 wt.%.