A case of subarachnoid ependymal (epithelial) cyst is described. It was located in the frontoparietal lobe of the brain, was lined with cuboidal epithelial cells, and had no communication with the ventricular system. The only clinical sign was epilepsy. Diagnosis was demonstrated by computerized tomography (CT). The cyst was removed and communication was created with the subarachnoid space. This rare pathology is discussed together with a review of the literature.