The author detected rare taurodontisms shown in full mouth standard films of a 21-years-old male patient for the chief complaint of hypersensitivity caused by cervical area to cold and came to the folloeing conclusions through an asthropolpgical and geographic study. 1. Anomaly of this kind was also found ina korean, a mongoloid descent. 2. This study shaw that two cases of hypertaurodont molars and nine cases of hypotaurodont molars were found in one single patient. 3. No particular relationship was found between the occurrence of dental caries and the anomaly of this kind. 4. The genetical study on the case was out of the question because the family of the patient did not offer co-operation.