A minimally invasive intervertebral body retaining cage insertion device is a cage insertion device for inserting a cage between adjacent vertebrae by using a screw driver for inserting a spine-retaining pedicle screw as a shaft. The intervertebral body retaining cage insertion device for a minimal invasive surgery includes: a retaining unit detachably coupled to a predetermined position on the screw driver； a position adjustment unit having holes defined along a longitudinal direction of a body and in which the retaining unit is fixed and coupled to a predetermined position of a hole； an instrument insertion guide rotatably coupled to an end of the position adjustment unit and inserted between the adjacent vertebrae； and a first cage insertion unit which moves along a rail formed on the instrument insertion guide and inserts a first cage between the adjacent vertebrae, wherein a minimally invasive operation is conducted by slightly incising the back side in a diagonal direction, it is unnecessary to rotate the direction of a cage, after inserting the same, towards the abdominal side of the human body, and the screw driver for inserting a spine-retaining pedicle screw (screw spike) is used as a shaft, therefore requiring no separate installation device.
