Abstract: A device for guiding a puncture tool to form a pilot hole through which a pedicle screw is buried in a pedicle, the device including a linear reference pin disposed forward from a rear side of a spine toward a target point of a pedicle base; a tubular sleeve having a sleeve central axis disposed at a predetermined insertion angle to the reference pin, and having a distal end open toward the target point and through which the puncture tool is passed and guided; and a rod member that couples a proximal side of the reference pin to the sleeve and maintains the sleeve central axis at the predetermined insertion angle to the reference pin. Plural slits are formed with a cutting direction orthogonal to the reference pin. A shape of a slit portion is recognized by an X-ray fluoroscopic image, and the puncture tool can be easily guided.