To provide a dental cutting aid with which parallelism and taper angle of a support tooth on which a abutment tooth equipped with a crown bridge can be obtained in high precision and the angle of an implanting hole and the parallelism of a plurality of the implanting holes can be easily secured in boring holes for implant.

This dental cutting aid is equipped with a base member 3 equipped between residual ridges of the upper jaw and the lower jaw in the buccal cavity, a first arm 4 oscillatably equipped on the base member 3, a first link 5 rotatably equipped on the first arm 4, a second link 6 equipped on the first link 5, a second arm 7 equipped on the second link 6, and a hand piece 9 which is equipped on one end part of the second arm 7 and equipped with a cutter 8. Rotation axes of the first link 5 and the second link 6, the axis of the second arm 7, and the rotation axis of the cutter 8 are made parallel with the axis of the first arm 4. An adjusting mechanism 10 to fix the first arm 4 onto an arbitrary oscilation position is equipped on the base member 3.