A case of the rare calcifying epithelial odontogenic tumor is reported. The tumor was situated high in the left maxillary antrum, bulging into the nasal cavity. The presenting signs were homolateral nasal stenosis and bulging of the lateral nasal wall. The clinical appearances and histological findings are submitted and compared with those in cases described previously. Treatment and prognosis are discussed. From the present case it is apparent that despite its odontogenic nature the tumor may occur so far from the teeth that clinically it may be mistaken for a tumor of the nasal cavity.