Although the goal of fracture treatment is alive bony union with anatomical reduction, prosthetic replacement is indicated for some complicated femoral neck fracture. However it is not defined until now which one is selected between hemiarthroplasty and total hip replacement for the delayed or complicated femoral neck fracture. In order to get the criteria which one is better for this patient when indicated, we reviewed the result of 39 endoprosthetic and 16 total hip replacement patients at Seoul National University Hospital between June of 1975 to June of 1980. Both methods of endoprosthesis and total hip replacement showed satisfactory results of 72% and 90% respectively. Considering two points of the pain-relief and walking ability, total hip replacement is believed to be far better than endoprosthesis, especially for those patients who are over 50 years of age and have had more active living conditions before fracture.