Clinical observation and analysis were performed on 481 cases of craniocerebral injuries under 15 years of age those were treated at Chung-ang University hospital during the period from January, 1972 to August, 1975. Following results were obtained: 1. There were 302 males and 179 females and sex ratio was 1.7:1. 2. Age incidence of the accidents was greatest at 5 years of age and mostly distributed to the age group between 5 to 7. 3. Seasonal peak of the accidents was at June. 4. The most frequent cause of the craniocerebral injuries was traffic accident(277 cases, 57.59%), and the next was fall from height(159 cases, 33.06%). 5. No deterioration of consciousness before and after the admission was observed in 176 cases(3.6%). 6. Pupillary change was observed in 28 cases in which unilateral were 21 and bilateral were 7. Babinski sign was elicitable in 91 cases. 7. Early convulsion and vomiting were frequent symptoms in childhood. 8. Skull fracture was observed in 204 cases(40.33%) in which linear fracture was most frequent. The location of the linear fracture was parietal and the predilection sites of the depressed fractures were frontal and parietal. 9. The accompanying rate of skull fracture in intracranial hemorrhage was;epidural 75%, subdural 50% and subarachnoid 17.3%. 10. The overall mortality was 8.32%. In non-surgical group(442 cases), the mortality rate was 7.47% but in surgical group(39 cases), operation mortality was 17.95%.