An eight-year-old patient was admitted to the hospital with proptosis and impaired vision in her left eye. Orbital echinococcosis was considered after imaging and heamatological examinations. An orbital exploration and excision of the lesion was performed. The cystic body was removed totally without rupture. Histopathological examination of the surgical material suggested the diagnosis of hydatid cyst of the orbit. Anahtar Kelimeler : Hydatid cyst, orbit, proptosis