Thirty-four patients with proximal humeral fratures were treated at department of orthopedic surgery, college of medicine, Seoul National University between 1978 and March, 19 99. They were followed up between six months and three and half years with average of 1.2 years. Mean age was 52.9 years and traffic accidents was the most common cause of injury. According to the Neers classification, there were seven one-part(20%), sixteen two-part(48%), seven three-part(20%) and four four-part(12%) fractures or fracture-dislocations. The methods of treatment and its results were analyzed according to the Neers classificatioin and they were summarized as follows; 1. Seven one-part fractures were treated conservatively and showed satisfactory results in all. 2. Sixteen two-part fractures were treated conservatively except tow old cases and showed satisfactory results except one. 3. Seven three-part fractures were tried to be reduced by closed means but unacceptable five cases were treated by open reduction. They showed satisfactory results except one. 4. Four four-part fractures were treated by open reduction in two, by prosthesis in headsplitting and severely comminuted cases. They showed satisfactory results except one.