A polyaxial bone anchoring device is provided including an anchoring element (2) comprising a shank (3) and a head (4) a receiving part (5, 5, 5") configured to pivotably receive the head (4), the receiving part (5, 5, 5") comprising a first end (5a), an opposite second end (5b), a central axis (C) extending through the first end (5a) and the second end (5b), a coaxial bore (6 6, 6b), and a recess (9, 9) adjacent to the first end (5a) for receiving rod (100, 101), wherein two legs (10, 11) are formed by the recess (9, 9) and wherein a longitudinal axis (L) of the recess is substantially perpendicular to the central axis (C) a first clamping part (13, 13, 130) that is configured to support the rod (100, 101) in the recess (9, 9) a second clamping part (21, 21) that is configured to exert pressure onto the rod when the rod is in the recess, wherein the second clamping part (21, 21) extends laterally from of the coaxial bore (6) into the recess (9, 9) between the legs (10, 11) a locking device (27) that is configured to exert pressure onto the second clamping part (21, 21) to secure the rod (100, 101) in the recess (9, 9) characterized in that the first clamping part (13, 13, 130) has a rod supporting surface portion (19, 19) that extends laterally from of the coaxial bore (6 6, 6b) into the recess (9, 9) between the legs (10, 11).本案提供一種多軸式骨骼固定裝置,包含:固定元件(2),包括幹部(3)和頭部(4);容納件(5,5,5"),構成樞動容納頭部(4),容納件(5,5,5")包括第一端(5a),對立的第二端(5b),延伸貫穿第一端(5a)和第二端(5b)之中心軸線(C),共軸腔孔(6;6,6b),和鄰近第一端(5a)之凹部(9,9),可供容納桿件(100,101),其中利用凹部(9,9)形成二股部(10,11),且其中凹部之縱軸線(L)實質上垂直於中心軸線(C);第一夾持件(13,13,130),構成支持桿件(100,101)於凹部(9,9)內;第二夾持件(21,21),構成當桿件在凹部內時,可施壓於桿件,其中第二夾持件(21,21)從共軸腔孔(6),側向延伸進入股部(10,11)間之凹部(9,9)內;鎖定裝置(27),構成施壓於第二夾持件(21,21),把桿件(100,101)保固於凹部(9,9)內;其特徵為,第一夾持件(13,13,130)具有桿件支持表面部(19,19),從共軸腔孔(6;6,6b)側向延伸,進入股部(10,11)間之凹部(9,9)內。1‧‧‧多軸式骨骼固定裝置2‧‧‧骨骼固定元件3‧‧‧幹部5‧‧‧容納件5a‧‧‧容納件第一端5b‧‧‧容納件第二端6‧‧‧共軸腔孔9‧‧‧U形凹部9a‧‧‧U形凹部底部10,11‧‧‧股部12‧‧‧陰螺紋13‧‧‧第一夾持件14‧‧‧圓筒形部19‧‧‧桿件支持表面21‧‧‧第二夾持件22‧‧‧朝向桿件表面27‧‧‧鎖定螺釘100‧‧‧桿件
