An interspinous intervertebral distractor is described. The intervertebral distractor has a distraction main body to be inserted between two adjacent spinous processes to provide a corresponding support, and a first and a second pair of lateral stabilizers, rotatably connected to the main body, which pairs are arranged respectively in correspondence of or near to a first and a second end of the latter, the stabilizers of each pair being able to assume a spread apart configuration projecting with respect to the main body so as to be able to engage from a respective side the spinous apophyses, holding in position the main body itself, wherein, in such projecting configuration, each stabilizer has a tilt with respect to the frontal plane that is equal to about 30 degrees.
