Dental handpiece

The utility model discloses a dental handpiece, relating to an oral cavity medical instrument and mainly solving the problems that the existing dental handpiece is low in precision at low cost and high in cost with high precision. The dental handpiece comprises a handle and a handpiece head connected with the handle, wherein the handpiece head comprises an end cover, a rotating shaft with a needle clamp, as well as a wind wheel sheathed on the rotating shaft, and bearings respectively and symmetrically arranged at two sides of the wind wheel. The dental handpiece is characterized in that an embedded piece is arranged between an outer ring of each bearing and the handpiece head; one side of each embedded piece, contacted with the bearing, is provided with a circle of groove with an L-shaped section; an O-shaped ring is arranged between the bearing and the embedded piece; a limiting stopper is arranged between the two symmetrical embedded pieces; and the limiting stopper is positioned at the inner wall of the h