Fracture-dislocation of the hip is a rare event that usually results from high-energy injury. These patients require a systemic trauma survey to uncover concomitant injuries. Early closed reduction within 6 h is recommended to decrease the incidence of avascular necrosis of the femoral head. Iatrogenic complete femoral neck fracture during closed reduction for posterior dislocation of the femoral head is a rare complication. A modified technique, the Kocher-Langenbeck approach, for open reduction of the femoral neck fracture using antegrade guide pins and retrograde cannulated screws fixation can resolute this situation in one stage. This method provides an anatomic reduction and stable fixation for this kind of injury.