PURPOSE : To analyze the clinical and radiological result of femoral trochanteric fractures treated by using Ender nails in elderly patients. MATERIAL AND METHODS :Sixty seven patients of femoral trochanteric fractures treated at Korean Veterans Hospital from 1993 to 1997 were included in this study. Under the C-arm guided, closed reduction and internal fixation with Ender nails was done within one week. According to Kyle classification, we classfied type I in 12case, type II in 20cases, type III in 25cases, typeIV in 20 cases and analyzed duration of bone union, ambulatory ability and postoperative complication. RESULT : The duration of union was from 14 weeks to 17 weeks and the mean was about 15.5 weeks. Thirty seven(60.7%) patients maintained their prefracture ambulatory ability at a postoperative 1 year and twenty four(39.3%) patient lost some degree of ambulatory ability. Postoperative complications were the knee pain and the limitation of the motion of the knee in 10 cases(14.9%), external rotation deformity in 7 cases(10.4%), distal migration of nails in 4 cases(5.9%), proximal migration of nails in 2 cases(2.(%), nonunion in 2 cases(2.9%). CONCLUSION : We conclude that the treatment by using Ender nails is one of the proper methods in elderly femoral trochanteric fracture with associated medical complication.