Provided is an electric screwdriver for spinal fixation. The electric screwdriver for spinal fixation inserts a screw into the spine of a human body and comprises: a joint rod to one end of which the screw is coupled and the other end of which is coupled to a motor a main body including a motor that is rotatable in the forward and reverse directions, a power transmitting unit for transmitting a rotating force of the motor to the joint rod, an electrical energy supply unit for supplying electrical energy to the motor, and a case, one end of which has a first holding portion to be held by one hand of a surgeon and which accommodates the motor, the power transmitting unit, and the electrical energy supply unit a second holding portion coupled to an outer circumferential surface of the case such that the second holding portion is rotatable relative to the case and can be held by the other hand of the surgeon and an automatic/manual operating unit which enables the second holding portion to be fixed on the case when the screw is inserted by operating the motor, and enables the second holding portion to be rotatable relative to the case when the motor stops operating and the surgeon manually inserts the screw.
