To make to enable to incline to position a cutting machine body by a positive stopping mechanism even at the inclining angles except 45.

A plurality of positioning recess parts 51 to 54 are provided in a stopper block 50 provided to be capable of inclining between the tilting base part 21 of a table side and the tilting supporting part 22 of the cutting machine body side 10 side. After a stopper member 41 changed at the position of the radiating direction is engaged with the positioning recess corresponding to the inclining angle desired to be inclined, the stopper block 50 is abutted to the stopper touching parts 34, 35 of the tilting base part 21 of the stopper block 50. Thereby, the cutting machine body is positioned at the desired tilting angle.