PROBLEM TO BE SOLVED: To solve such a problem that, when a pedicle probe is pulled out, an insertion hole formed in the vertebra is hid by a tissue near the spinal column and the insertion of a fixing screw is not easy.SOLUTION: The pedicle probe is configured that a probe 2 for forming a fixing screw A of a connection unit in the pedicle of the vertebral arch of the backbone and the sacrum of a patient is detachably attached to a pedicle probe body 1 by a shaft member 4 having an insertion hole 5 in which a base part of the probe 2 can be inserted, an outer casing 15 that is slidably provided around the outer periphery of the shaft member 4, and an engagement body 10 that has an engagement protrusion 9 to be disengageably engaged with an engagement groove 6 of the probe 2.
