To correct inclination of a lateral tilt axis in a simple low-cost configuration since a depth of grooving processing is varied and a cutting surface of inclined cutting is also tilted in front and rear directions so that accurate inclined cutting becomes difficult, while the lateral tilt axis is tilted to a table surface by a factor of a self weight or the like of a cutter body in a desktop cutter where an inclined support part 22 at the cutter body side rotatably combines with an inclined base 21 at a table side so as to allow the cutter body to be laterally tiltable from a right angle cutting position.

An inclination correcting protrusion 50 is arranged, at the upper part of the inner protruding flat part 21c of the inclined base 21 that is mutually fitted at a spigot, and the protrusion 50 is butted against the inner recessed flat part 22c of the inclined support part 22 and corrects the inclination of the lateral tilt axis J.