A stabilizer device (1) for the
spinal column, comprising first engagement means (4) and second engagement means (5), which are adapted to be connected to each other by a rod-like element (8), the first and second engagement means (4, 5) being adapted to be fitted on first and second pedicle screws (2, 3), which are adapted to be in turn inserted in two adjacent vertebrae, the first and second engagement means (4, 5) being fixable on the pedicle screws (2, 3); the first and second engagement means (4, 5) accommodate bearing means (20), which are adapted to rotate within the first and second engagement means (4, 5) and to be fitted on the pedicle screws (2, 3), in order to allow the fitting of the first and second engagement means (4, 5) on the pedicle screws (2, 3).