A spinal fixation device according to an embodiment of the present invention includes a plurality of spinal screw threads spaced apart from each other by a predetermined distance and installed at a predetermined angle and depth at the spinal column； A head portion provided on an upper portion of the pedicle screw and having a U-shaped seating groove； A spinal rod that is seated in the seating groove and connects the plurality of pedicle screws； A first rod assembly guiding guide having a structure in which a lower portion is detachably mounted on the head portion and an upper portion is protruded toward an upper portion of the head portion； A second rod assembly which is spaced apart from the first rod assembly guiding guide and whose upper end is provided at the head portion of the first rod assembly guiding guide so as to guide insertion of the spine rod into the head portion together with the first rod assembly guiding guide Guide guide； And an engaging member coupled to the head portion in a state in which the vertebral rod is seated, the first rod assembly guide and the second rod assembly guiding guide being bent inwardly from the outer side And the first rod assembly guide and the second rod assembly guide are formed so that even when a plurality of spinal screw threads are provided in an irregular arrangement on the spinal column, It is preferable to guide insertion of the plurality of pedicle screw into the head portion through the stepped space between the second rod assembly induction guides.본 발명의 일 실시예에 따른 척추고정장치는 상호 간에 소정의 간격으로 이격되어, 소정의 각도와 깊이로 척추경에 설치되는 복수의 척추경나사못； 척추경나사못의 상부에 마련되고, U자형 안착홈이 마련된 헤드부； 안착홈에 안착되어 복수의 척추경나사못을 연결하는 척추로드； 하부가 헤드부에 탈착가능하게 설치되고, 상부가 헤드부의 상부를 향해 돌출된 구조를 가진 제 1 로드조립유도가이드； 제 1 로드조립유도가이드와 이격되고 상단이 제 1 로드조립유도가이드의 상단과 단차지게 헤드부에 설치되어, 제 1 로드조립유도가이드와 함께 척추로드의 헤드부로의 삽입을 가이드하는 제 2 로드조립유도가이드； 및 척추로드가 안착된 상태에서 헤드부에 결합되어, 척추로드의 이탈을 방지하는 결합부재를 포함하고, 제 1 로드조립유도가이드와 제 2 로드조립유도가이드는 하단이 외측에서 내측방향으로 절곡되어 헤드부의 외주하부면에 끼움결합되고, 제 1 로드조립유도가이드와 제 2 로
