The authors have studied 60 cases of back pain with respect to diagnostic accuracy of myelography with metrizamide from January, 1983 to Decembar, 1984 at the Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University. The results were as followes; 1. Of the 60 cases, 57 cases (95%) showed excellent and good findings of myelography. 2. In case of the marginal clearance of the nerve-sleeve in myelography, the excellent finding was 93.3%.3. The side effect of myelography was slight and 44% of all patients complained of headache, which disappeared within 24 hours after onset in 92% of them. 4. The accuracy rate of myelography with metrizamide was 89. 2%.