The radial styloidectomy is a symptomatic treatment of the radio scaphoïdal impingement. Famous many years ago for the treatment of post-traumatic arthritis of the wrist (SLAC, SNAC wrist) this procedure has been progressively abandoned. The miniaturization of the wrist's arthroscopical tools allows stiloidectomy under arthroscopy. This treatment allows the disappearance of the impingement and protects the surrounding soft tissue. After a short historical, anatomical and biomechanical study, the authors expose the technique of the styloidectomy under an arthroscopic procedure.