To easily fixedly hold a tool angle and sharpen a cutting tool at suitable angle for every cutting tool by providing a cutting tool receiving base capable of adjusting a tool angle, and providing tool edge stoppers fixing a cutting tool on the cutting tool receiving base.
A cutting tool receiving base 1 is positioned on a grinding tool 2, a cutting tool receiving base supporting part 12 is contacted with the upper face of a slide base 9, an angle adjusting notch adjusting the angle of the cutting tool receiving base 1 is engaged with an angle fixing pin 6, and they are moved integratedly in the longitudinal direction. Tool edge stoppers 3 are fixed on both sides of the cutting tool receiving base 1 through tool edge stopper adjusting slits 5, so that a cutting edge projects in front of the point of intersection C with the grinding tool by about 2mm. The grinding tool 2 suitable for the cutting tool 13 is fixed on a grinding tool receiving base 4, and inclination of the cutting tool receiving base 1 is conformed to the cutting edge angle of the cutting tool 13. The cutting tool 13 is placed on the cutting tool receiving base 1 setting the angle, and the cutting edge is put on the cutting edge stopper 3. Hereby the cutting tool 13 can be easily sharpened at a suitable angle.