disclosed is a spine fixation apparatus , more particularly , a pedicle screw implanted into a spine and an operating device for the pedicle screw capable of easily inserting a rod to a head 5 section of the pedicle screw in order to securely fix the spine . the pedicle screw has a head section including a recess part defined by first and second sidewalls , a screw section , and a support unit formed at an upper portion of the recess part of the head section while connecting the first sidewall to the second sidewall .