The present invention relates to a safety subantral membrane lifter comprising a bone-fixing unit including a bone-fixing arm mounted on the top of the bone-fixing unit, a bone-fixing unit body arranged at the lower end of the bone-fixing unit, and a bone-fixing unit support arranged at the lower end of the bone-fixing unit body. The bone-fixing unit comprises: said bone-fixing unit body, which is cylindrical and which has an open end and a space formed therein； said bone-fixing arm arranged at one end of the bone-fixing unit body and which is inclined toward one end thereof； two side blades protruding outwardly from both sides of the bone-fixing unit body and formed in the vertical direction so as to be sharp； and said bone-fixing support arranged at the lower end of the bone-fixing unit.； The safety subantral membrane lifter of the present invention may directly adjust the subantral membrane to safely lift the subantral membrane in a desired direction by a desired distance.本發明涉及一種直接調節上頜竇粘膜能夠使上頜竇粘膜向所需的方向安全地提升到所需程度的安全上頜竇粘膜提升器，該安全上頜竇粘膜提升器由骨固定部、設置於骨固定部的上端的骨固定臂、設置於骨固定部的下端的骨固定部主體及設置於骨固定部主體的下端的骨固定部支架構成，上述骨固定部包括：骨固定部主體，其呈圓筒形，在內部形成有空間部，且末端部分開放；骨固定臂，其越靠近末端越傾斜地形成在上述骨固定部主體的末端部；兩個側面刃，其分別向外部突出而向垂直方向尖銳地形成在骨固定部主體的兩個側面；骨固定部支架，其設置於骨固定部的下端。
