A surgical drilling device comprising a handpiece head (15) for surgical bone cutting, preventing injuries of soft tissues； the head is operable by a handpiece body and by an electric motor, and comprises a reciprocating element (2) inside which a surgical drill (1) can be inserted. An alternate partial rotation is applied to the drill (1) instead of the traditional 360° continuous rotation, either through actuation of an electronic motor, or through mechanical coupling. The reciprocating element (2) is supported and stabilized by at least two bearings (8,9) mounted respectively on the upper cylindrical hub (5) and on the lower cylindrical hub (6). A coupling system is further provided for locking the drill (1) axially, as well as in rotation with respect to the hub (5). This coupling system preferably comprises an anti-rotation flattening (7), located in the interior of the upper hub (5), and that is coupled to a corresponding notch (3) of the drill (1), in order to prevent any rotation of the shaft (1) with respect to the reciprocating element (2)； the length (L) of the flattening (7) is preferably comprised between 2 mm and 4 mm. A differential mechanism may be responsible for transforming the rotary motion of the electric motor into the alternate rotation of the reciprocating element (2), when the electric motor is not actuated directly into reciprocal rotational movements； the amplitude of said alternate rotation is between 0° and 120 °.L'invention concerne un dispositif de perçage chirurgical comprenant une tête de pièce à main (15) destinée à la découpe chirurgicale d'un os, empêchant des lésions dans les tissus mous； la tête pouvant fonctionner grâce à un corps de pièce à main et à un moteur électrique, et comprenant un élément de va-et-vient (2) à l'intérieur duquel un foret chirurgical (1) peut être inséré. Une rotation partielle alternative est appliquée sur le foret (1) au lieu d'une rotation de 360° continue classique, soit par l'intermédiaire de l'acti
