Interlocking nailing is the best method available in treatment of femoral shaft fracture dui to its many advantages compared with other method. However, we have encountered many problems during the operative procedure and postoperative periods due to technical complexities. After we have evaluated problems during and after the procedure of interlocking nailing for the femoral fractures in 56 cases, we suggest the means to avoid these errors and complications.

1. Among the 54 patients,39 complications and technical errors have been reported in 19 patients.

2. Intraoperative complications and technical errors were encountered in ; 9 cases of improper portal of entry, 3 cases of new fragmentation,3 cases of angulation,2 cases of new fracture line,2 cases of failure of distal locking screw insertion,2 cases of distraction of fracture site, 1 case of proximal protrusion of nail and 1 case of rotation of nail.

3. Postoperative complications were encountered ,6 cases of delayed union,2 cases of nonunion,2 cases of limb shortening,2 cases of deep infection,2 cases of loosening of distal locking screw, 1 case of breakage of distal locking screw and 1 case of failure of nail.