Femoral shaft fractures occur in 10–37 / 100.000 patients per year, and mainly male young patients are affected (median age 27 years) compared to the fracture of the elderly in female patients (median age 80 years). Fracture of the femoral diaphysis is a common fracture which is seen frequently in orthopaedic department . Treatment can be operative and nonoperative. Usually operating managment is preferred and results are good. In developing countries patients suffer from low social economic conditions which cause problem in seeking treatment so malunion and non union are common. The problem treating malunion are related to restoring the axis; the limb length and joint mobility in the knee and hip Diaphyseal malunion poses a great challenge for the orthopedic surgeon, and an inundation of morbidity for the patient. Diaphyseal malunion can cause altered gait, adjacent joint osteoarthritis and body dissatisfaction. we present our experience in a case of 11month old malunited shaft of femur fracture which was treated with open reduction and internal xation using a broad dynamic compression plate (dcp). The object of surgery was to restore the function. The common indication for operating malunited shaft femur fracture are overlaping , angulation >10-15◦ and rotation > 45◦ with or without angulation (externally or internally) and relieve pain. ABSTRACT KEYWORDS : deformity; malunion; nonunion; femoral osteotomy ; plating; broad dcp ; diaphyseal malunion