An electric screwdriver that inserts a screw into the spine of a human and includes: a joint rod to which the screw and a motor is coupled, a power transmitting unit for transmitting the 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 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 when operating the motor, and rotatable when the motor stops operating and the surgeon manually inserts the screw.
