Clinical features of two patients with mixed angiomas are presented. One patient with a cerebral venous angioma with arterial components was successfully treated with radiation therapy; and the other, who had a common draining vein with cerebellar arteriovenous malformation and venous angioma, was treated with surgical removal of the arteriovenous malformation. These two cases suggested that there is a similarity between the pathogenesis of arteriovenous malformation and venous angioma in the brain.