The effects of subarachnoid administration of 0.5% bupivacaine in 5% and 10% glucosesolution were investigated in a randomized 30 cases undergoing a low limb and low abdominal surgery in the Department of Anesthesiology at the Hanyang University Hospital from October 1st, 1984 to March 31st, 1985. The results are as follows: 1) These were no significant differences between the patients of the three groups in relation to sex, age, weight, height and operation time. 2) The oneset time of the maximum segmental spread of analygesia in the control group was 5 to 10 minutes and 10 to 15 minutes in the experimental groups. 3) The spread of sensory blockade in the experimental groups was lowered 2~3 segment compared with control group. 4) The onset time of complete motor blockade in the control group was 5 minutes and 5~10 minutes in the experimental group. 5) Duration of complete motor blockade in experimental groups was shorter than the control group. 6) The cardiovascular changes were investigated with no significant differences between the patients of the three groups. 7) The minimal complications such as mild hypotension in three cases, micturition difficulty in one case, mild translent headache in one case were investigated in the three groups. According to our investigation of subarachnoid blockade with 0.5% bupivacain 2ml in 5% and 10% glocose solution, it considered that the spread was limited and produced intense sensory and motor block of long duration which was suitable of the low limbs and low abdominal surgery.