The aim of the present invention is to provide a ceramic whetstone (3) which can accelerate sharpening cutlery smoothly. The ceramic whetstone (3) includes a ceramic stick (30) with high straightness accuracy having a plastic nut (31) at a first end, a plastic handle (32) at a second end. A bump (311) disposed on the inner area of the bottom of the plastic nut (31), a fixed bump (321) disposed inside the hollow plastic handle (32) to seal a second end, a stop plate (322) disposed on a top end of the handle (32) for shielding the area between thumb and index finger of a user, the stick (30) has an axial hole (301) accommodates the plastic nut (31) and the handle (32) fit over to both ends respectively, the bump (311) and the fixed bump (321) fit in the axial hole (301) to resist against the stick (30).