Two cases of necrosis of the head of the femur, one associated with an ununited fracture of the neck and the other with an ununited fracture at the junction of the head and neck, which developed after healing of a primary fracture located distally in the neck, were treated by drilling two holes across the neck and upper portion of the head and the insertion of a rectangular tibial bone graft into each hole. The fractures united promptly and the upper portion of the head was rapidly invaded and replaced by new bone, thereby avoiding collapse of the head from weight-bearing. In one patient, function was restored practically to normal and there was little roentgenographic evidence of degenerative arthritis, seven and one-half years after operation. An equally promising result was present in the other patient at the end of twelve and one-half months.