Supracondylar fracture of the humerus is the most common fracture about the elbow in children, and frequently accompanies neurovascular complications. It is one of the most difficult to manage and is frequently associated with significant residual complications. In the treatment of supracondylar fracture of the humerus, prompt and accurate reduction without additional trauma is mandatory. 114 patients with supracondylar fracture of the humerus who were admitted and treated at the Department of Orthopedic Surgery of Hanyang University Hospital from May, 1972 to May, 1981 have been reviewed. The results obtained are as follows: 1. Supracondylar fractures of the humerus frequently occurred between the ages of 5 and 12 years (77.2%), and the sex ratio was 2.5:1 in male to female. 2. Of all fractures, 96.5% were the extension type and 3.5% were the flexion type. According to the Holmberg classification, type IV fractures were most common. 3. In the injuries associated with fracture, there were 6 ipsilateral forearm fractures, 6 neural injuries, 4 vascular injuries, and 2 neurovascular injuries. In 8 traumatic neuropathies, median nerve was involved most commonly, and they were recovered spontaneously within 6 week except 1 case, which was repaired surgically. 4. Most cases were treated successfully by early manipulative reduction, but in the presence of neurovascuiar signs and symptoms, continuous traction or open reduction was indicated. 5. The result of treatment of the conservative treatment group was better than that of the operative treatment group.