Fifty to sixty per cent of all intracranial tumor in childhood occur in the posterior fossa. Because of the narrow confines of the posterior fossa, a tumor produces significant shifts of the arteries and veins allowing a decision to be made on the site of the tumor. Therefore, vertebral angiography is a very important diagnositc tool for detection of the posterior fossa tumor in children. Vertebral angiographic findings of twelve cases of proven childhood posterior fossa tumor at Seoul National University Hospital during recent two years from September, 1976 are presented with the operative and histopathologic findings. Location of the posterior fossa tumor can be suggested by vertebral angiographic criteria with high degree of accuracy in the majority of cases prediction of the histopathologic type is possible according to the location of the tumor and incidence of a certain specific histopathologic type of the tumor along the site.