Disclosed herein is a hitting device for forming a hole by hitting an alveolar bone at a predetermined force, the hitting device including: a hollow shaped housing having an internal space formed therein a driving rod inserted into the internal space in a state in which a front end portion thereof is exposed outside the internal space a receiving body coupled to the driving rod so as to be movable in a direction intersecting with an extension direction of the housing and having a receiving space opened at an upper portion thereof and including a bottom surface formed at a lower portion thereof a hitting body disposed at the internal space and elastically supported by the housing, such if the hitting body becomes to be aligned with the opened upper portion of the receiving space, the hitting body hits the bottom surface, thereby transferring an impact to the front end portion and an inducing body installed at the internal space and inducing the receiving body to be changed from a state in which the receiving space is not aligned with the hitting device to a state in which the receiving space is aligned with the hitting device by the movement of the receiving body when the front end portion is moved in a direction toward the internal space.Linvention concerne un dispositif de frappe pour former un trou par frappe dun os alvéolaire à une force prédéterminée, le dispositif de frappe comprenant : un boîtier creux ayant un espace interne formé à lintérieur de celui-ci une tige dentraînement introduite dans lespace interne dans un état dans lequel sa partie extrémité avant est exposée à lextérieur de lespace interne un corps de réception couplé à la tige dentraînement de façon à pouvoir se déplacer dans une direction coupant une direction dextension du boîtier et ayant un espace de réception ouvert à sa partie supérieure et comprenant une surface inférieure formée à sa partie inférieure un corps de frappe disposé au niveau de lespace interne et supporté élastiquement pa
