Conventional radiography of the adrenal glands are too often unsatisfactory. It is well known that the wholebody computed tomography is very useful in identifying retroperitoneal pathology. The authors intended to presentnormal data of adrenal glands for preparation of basis for interpretation of abnormalities. We reviewed CT scans of 30 cases without evidence of adrenal disease and 4 cases of adrenal lesions. The results are as follows; 1.There were 16 male and 14 female patients, and their ages ranged from 10 to 70 years. 2. On CT, both glands were shown in 23 (76%), the right in 24 (80%) and the left in 26(86%). 3. Most of the right adrenal gland was linear or comet in shape in the apex, and partly 'inverted V' in the base. 4. The right adrenal and length of 2.4±0.8cm,width of 2.6±0.8cm and thickness of 0.6±0.1cm. The left adrenal, 2.5±0.7cm, 2.4±0.5cm and 0.7±0.1cm respectively. 5. In 2 cases of Cushing's syndrome, CT demonstrated grossly enlarged, smooth-contoured adrenalglands with convex borders. 6. In the case of cortical adenoma, CT showed the mass of homogeneous low density as aresult to high total fat content. 7. In pheochromocytoma, CT showed relatively large mass with low density.