The purpose of this paper is to evaluate and analize the radiological findings and operative results of lumbar disc syndrome at Han-gang Sung-sim Hospital during the period from March 1973 to July 1976. The results are as follows: 1. The age distribution of the patients varied from 18 to 65 years old. The average of the age was 35 years old. Fourty six patients were male(62.2%) and twenty eight patients were female. 2. The size of the lower lumbar spinal canal was slightly decreased as compared with that of the normal control group and the intervertebral disc space was also decreased. It is considered that the initial and fundamental cause of lumbar disc syndrome is degenerative change of intervertebral disc and also posterior articulation facet. 3. Decreased lumbar lordosis in comparison with that on the normal control group is considered to be due to degenerative change of vertebrae and increased lumbar muscular rigidity. 4. In this series of 74 patients considered to be hav severe lumbar disc syndrome, 43 had simple herniation of nucleus pulposus, 12 had lumbar spondylosis and 2 had spinal stenosis. The remainder had combination of two or more of these three conditions, as determined by pantopaque myelography in all cases and substantiated by operative findings in the majority.