A 50-year-old man with progressive headache and memory impairment was found to have a mass in the anterior third ventricle. Computed Tomography (CT) of the brain showed a hyperdense ovoid-shaped lesion in the suprasellar-hypothalamic region. Magnetic Resonance Imaging (MRI) revealed an intensely enhancing mass with an eccentric cyst in the anterior third ventricle near midline. Total resection was performed under the impression of third ventricle tumor, and chordoid gliomas was diagnosed histopathologically. To our knowledge, this is the first case of chordoid glioma reported in Taiwan literature.