The common serious consequences of trauma to the temporal bone are hearing loss, hemotympanum and facial nerve paralysis. To minimize or prevent these sequelae, accurate radiological evaluation is necessary as soon after injury as possible. High resolution CT of the temporal bone delineate the fine structures of the middle and inner ear including ossicular chain. Excellent resolution of density differences among the soft tissue is the main advantage over conventional tomography. 21 cases of temporal bone fracture were examined at Keimyung university hospital for recent 18months. The results were as follows; 1. The sex distribution of cases were 18 males and 3 females, and most common in the third decade(42.9%). 2. The most common cause was motor vehicle accident(71.4%). 3. The most common type of fracture was longitudinal(81%). 4. clinical symptoms and signs were hearing loss, hemotympanum and facial nerve paralysis in order of frequency. 5. 5 conductive hearing loss were note in 12 hearing loss of 17 longitudinal fractures. 6. The ossicular changes were noted only in longitudinal fracture, such as 3 incudostapedial separation, 2 incudomalleal separation and 1 incus dislocation