Injuries of the atlanto-axial area in cervical vertebra may be lethal or immediate death. But precise understanding of normal anatomy and basic injury mechanism enables accurate detection of possible injury site and reduce the irreversible neurologic change by specific type of treatment. Authors analyzed retrospectively the radiologic findings fo fracture of atlanto-axial area. 1. The age distribution was between 5-51, concentrated at third and 4th decade. 2. In atlas fracture, posterior arch involvement was 6 cases among the 7 patients. 3. In axis, odontoid process fracutre was a predeominant portion, and type II fracture was 11 among the 14. 4. Favorite direction of dislocation in odontoid process fracture, anterior dislocation was predominant. 5. Reconstruction image should be obtained about axis fracture due to various direction of dislocation fragment.