Spinal osteosynthesis instrumentation has link connector between a vertebral rod and bone anchoring bodies

The disclosed apparatus comprises at least one spinal pin (1), bone-anchoring elements (2) disposed at intervals along the pin, a connector (3) for fastening the pin to each anchoring element, and pressure elements (4) to hold the pin, anchoring element, and connector together. Each anchoring element has a anchorage support (7) for the pin, inclined with respect to the longitudinal axis (XX) of the anchoring element. A recess (11) is disposed in the connector and provides at least one support point for the pin, which is held prisoner between said inclined support surface and a wall (12) of the recess; said recess extends into a lateral opening (18), allowing the spinal pin to be inserted radially into its recess. The convenience of insertion of the pin into the connector facilitates use of the apparatus for surgeons, and the direct contact of the pin on the support (7) of the anchoring element (2) reduces the required transversal space.