A randomised, double-blind controlled in patients undergoing elective knee arthroscopy to assess the analgesic effect of intraarticular bupivacaine alone and in combination with morphine. Group I (n = 30) received 50 cc of NSS, group II (n = 30) received 50 cc of 0.2 % bupivacaine with adrenaline and group III (n = 30) received a combination of 2 mg of morphine. All drugs were injected intraarticularly. Postoperative pain was assessed by using the visual analogue scale at 0, 2, 4, 8, 12, 16, 20, 24 hr after the intraarticular injection. The need for supplement analgesia was recorded. Results showed that there was no significant difference in the pain scores or analgesic requirements between group II and III. Patients in group II and III had significantly lower pain scores than those in group I. The low pain scores were associated with lower requirements of supplementary analgesics. We conclude that intraarticular bupivacaine alone and in combination with morphine significantly reduces postoperative pain following knee arthroscopy and that there is no advantage of combining bupivacaine with morphine.