The Supracondylar fracture of the humerus is the most common elbow fracture in children. In general, accurate anatomic reductio, the least regional trauma as possible and the maintenance of the reduction are necessary to obtain excellent results. Lateral and posterior approach is commonly used method for the treatment of supracondylar fracture of the humerus in children. But lateral and posterior approach has some troubles in reduction of fracture and Kirschner wire fixation. From March 1988 to February 1993, seventeen supracondylar fractures of the humerus were treated by means of medial approach and followed from 8 monts to 13 months with an average 10 months. There were some advantages in medial approach. Reduction was easy and ulnar nerve was not damaged by medial approach at insertion of Kirschner wire and no more another incision. The results obtained are as follows. Postoperative vascular impairment or Volkmann's ischemia was not complicated and neurologic deficits accompanied with injury were all recovered completely. According to Mitchell and Adams' criteria, all had satisfactory results.