The author has a high incidence of pinealoma in his series of intracranial neoplasms. In order to make a diagnosis of pinealoma of the pineal region and of the chiasmal region, pneumoencephalography or ventriculography is very useful in addition to the neurological findings and the plain radiographic findings. The author emphasizes the usefulness of the Millipore filter-cell culture of the cerebrospinal fluid and of the ventriculofiberscopy for the diagnosis of pinealomas in children. The reported cases were treated by a combination of radiation and surgery.