This paper presents a rare case of intracrania ependymoma originating from the floor of third ventricle of a 12 year old girl. It manifested as a painless, progressively increasing swelling at the medial angle of left eye with proptosis which was without any extracranial metastasis. Excision biopsy was made by external ethmoidectomy revealed it to be an ependymoma. Partial excision combined with chemotherapy showed no recurrence and no evidence of metastasis for six months.