PURPOSE: To fasten a composite compact composed of a super abrasive material layer and a support base to an abrasive tool main body at a high torque.

CONSTITUTION: In an insert for an abrasive tool made of a composite compact of a super abrasive material which has super abrasive material layers 3; 10, 11 composed of diamond or cubic system boron nitride, support bases 4; 15, a hole penetrating the both, a sleeved 2 bolt 20 is attached in a hole of the composite compact. A sleeve 2 is extended over the entire length of the hole of the composite compact, and is provided with collars 5, 6 spreading on the surfaces of the super abrasive material layers 3; 10, 11.