We report two cases with old femoral neck fracture. One patient was an 80-year-old woman who had fallen down 6 months previously. The other patient was an 88-year-old man who had fallen down 4 months previously. Both patients had severe flexion contracture in their hip joints, and X-rays examinations showed severe old femoral neck fractures. Surgery was performed using bipolar hemiarthroplasty. This procedure was chosen in consideration of the patients' age and the presence of several risk factors related to their general condition. As the contracture was severe in the first case, we performed release of the soft tissues, especially in the area of the rectus femoris. After surgery, both patients regained full extension of their hip joints, and were able to start standing and walking exercise one week after the operation. Their ADL scores were obviously improved in comparison with those before surgery. We think that the release of soft tissue is useful in order to improve the contracture of the hip joint with old femoral neck fracture.