Cutting edges are formed in a main body of a burr, and a connection member that is clamped and fixed in a dental handpiece is connected to the main body. The connection member has an extended portion that extends in a longitudinal direction of the main body, and has a coupling groove formed in the extended portion. The main body includes: a front end portion that has a hemispherical shape, a rear end portion that is directly connected to the connection member, and a curved portion that is disposed between the front end portion and the rear end portion. The curved portion has a diameter which is the smallest at a central portion and increases toward the front end portion and the rear end portion. The cutting edges formed in the main body include longitudinal cutting edges that are formed in the longitudinal direction of the main body.
