Many studies have shown that epidural narcotics produce prolonged analgesic action. We instillated 2mg of morphine on the dura just before wound closure which was exposed for lumbar laminectomy. Sixty patients scheduled for laminectomy were devided into two groups i.e., morphine group (30 patients) and control group(30 patients). The results of this study were as follows: 1) In morphine group, 17 patients (56.6%) tolerated the postoperative pain without narcotic injection for over 20 hours, but 13 patients(43.3%) of the control group required narcotic injection within 5 hours. 2) Severe respiratory depression was noted in two cases from the morphine group. 3) It is a very simple and effective method for postoperative pain control.