Meningiomas of the third ventricle, especially those located in its anterior part, are a rare occurrence. Two patients with meningiomas of the third ventricle are described. In one of them the tumor was removed successfully. Pneumoencephalography and positive ventriculography are of decisive importance in the diagnosis of these tumors. Analysis of the data in the literature and the authors' personal observations shows that timely removal of these tumors with the use of rational approaches and microsurgical techniques may yield satisfactory results.