31 cases of general anesthesia for total hip replacement which were performed at K.N.U. hospital from 1980 to 1982 were measured blood pressure, blood loss, hemoglobin, and hematocrit before, during, and after operation. Blood pressure were monitored right before and at 1, 3, 5 and 8 min intervals after the insertion of the acrylic cement into the acetabulum and the femur. There was a tendency to decrease in blood pressure at 3 min after the insertion of acrylic cement in to the femur. The blood loss during and duration of 36 hrs after halothane anesthesia revealed tendency to decrease compared with the enflurane and ether. Hemoglobin and hematocrit values taken on before, during, and the 1st day after operation did not show and changes.