Postirradiation fracture of pelvis and femoral neck is a rare complication of malignant carcinoma of pelvic organs. According to Leabhart and Bonfiglio(1961), femoal neck fracturare after radiotherapy of pelvic organ carcinoma is about 1.5% among the involved patients and the common sites of primary neoplasms are cervix, uterus, ovary and urethra in order. Acase of 53-year-old female with postirradiation femoral neck fracture was treated at department of orthopedic surgery, Ewha womans University Hospital after 5,000 rad. of radiotherapy for the treatment of urethral malignancy.