The invention concerns an inner fixation device for the correction of axial deformities of a limb, for example a long limb, of the type comprising at least one plate (2, 2′) for epiphysiodesis with at least a pair of lobes (3,4) each provided with a through hole (7) to be laterally fixed to a bone portion or to a long bone head. Advantageously, the device (1) comprises one second plate (12, 12′) placed on the opposite side of the bone portion with respect to said at least one plate (2, 2′) and connected to that by at least one rod (15) passing through the bone portion. The rod (15) is extended through the bone in parallel to an epiphyseal plate and it has opposite extremities (16,17) connected to the plates (2,2′; 2,12′) to keep them close to the bone and to stop the bone growth in one central portion of the bone.