In this series of forty-four patients with Brittain ischiofemoral arthrodesis of the hip performed for tuberculosis, aseptic necrosis of the femoral head, postinfectional arthritis, degenerative arthritis, and miscellaneous conditions, solid fusion was obtained in thirty-five (80 per cent) of the forty-four patients. In all the failures, the tibial graft had not been inserted firmly into the ischium; this appeared to be the chief cause of failure. All patients were immobilized for from six to nine months in a plaster spica cast. No serious complications were encountered. It was concluded that ischiofemoral arthrodesis is a satisfactory technique to achieve hip fusion in diseases of the hip other than tuberculosis.