A bone anchoring device is provided including a receiving part (5, 5) for receiving a rod (7), the receiving part having a longitudinal axis (C), a first bore (51) coaxial with the longitudinal axis and a second bore (52) an anchoring element (1) having a first end (2) for insertion into the bone and a second end positionable within the second bore, the second end including a head (3, 3, 3") the anchoring element (1) being movable relative to the receiving part (5, 5) in a limited angular range about the longitudinal axis, the angular range lying in a single plane an guiding member (4, 4, 4", 400) configured to rotate in the first bore (51) wherein the head (3, 3, 3") of the anchoring element is connected to the guiding member (4, 4, 4", 400) and wherein a form-fit connection limits the movement of the anchoring element to the single plane a locking device (10) comprising a first locking element (8) that acts on the guiding member (4, 4, 4", 400) to fix the rotational position of the guiding member and a second locking element (9) that acts on the head to fix the head (3, 3").本案提供一種骨骼固定裝置,包含容納件(5,5),供容納桿件(7),容納件有縱軸線(C),與縱軸線共軸之第一腔孔(51),和第二腔孔(52);固定元件(1),有可供插入骨骼內之第一端(2),和可定位於第二腔孔內之第二端,第二端含有頭部(3,3,3");固定元件(1)可相對於容納件(5,5),在限制角度範圍內繞縱軸線運動,角度範圍位在單一平面;導引構件(4,4,4",400)構成在第一腔孔(51)內轉動;其中固定元件之頭部(3,3,3")連接於導引構件(4,4,4",400),且其中形式套合連接限制固定元件於單一平面運動;鎖定裝置(10),包括第一鎖定元件(8),對導引構件(4,4,4",400)作用,以固定導引構件之轉動位置,和第二鎖定元件(9),對頭部作用,以固定頭部(3,3")。1‧‧‧骨骼固定元件2‧‧‧幹部3‧‧‧頭部3a‧‧‧頭部平坦表面4‧‧‧導引構件5‧‧‧容納件6‧‧‧壓力構件7‧‧‧桿件8‧‧‧第一鎖定元件8a‧‧‧第一鎖定元件第一端8b‧‧‧第一鎖定元件第二端9‧‧‧第二鎖定元件10‧‧‧鎖定裝置41‧‧‧長方形凹部53‧‧‧U形凹部54‧‧‧陰螺紋55‧‧‧折斷點61‧‧‧U形凹部81‧‧‧螺紋貫穿孔
