Even the antituberculous drugs could cure the disease itself, it might not prevent progressive kyphosis and its sequelae. Therefore, radical curettage and anterior arthrodesis with autogenous strut bone graft has been used to prevent this deformity. From May 1982 to May 1989, twenty four cases of spinal tuberculosis treated with anterior arthrodesis were analysed about the progression of postoperative kyphosis. These cases were followed up for more than 1 year at least, and the following results were obtained; 1. Lumbar spine was most commonly involved. There was involvement of one disc space in 12 cases, only narrowing of disc space in 7 cases, and two disc spaces in 5 cases. 2. The degree of vertebral loss was under 1 in 15 cases, 0 (disc space narrowing only) in 7 cases, and over 1 in 2 cases. 3. Compared with immediate postoperative kyphotic angle, there was increase of kyphotic angle in 15 cases but most of them were under 10 degress. 4. Preoperative degree of vertebral loss of 15 incerased cases was 0.5 and that of 9 decreased of maintained cases was 0.2 in average. 5. Preoperative vertebral involvement of 15 increased cases was 1.3 and that of 9 decreased or maintained cases was 1.2 in average.