Total six cases of can cementoma encountered during the period of 1960 to July, 1974 at the department of oral pathology, college of dentistry, Seoul National University were clinically and histpathologically. As the result of present study the following conclusions were obtained. 1. The total six cases of cementoma consisted of four cases (67%) of male and two cases (33%) of female. The ratio between male are female was 1:2. 2. Three of 6 cases occurred in the decade and the mean age was 43.5 years. 3. All six cases occurred in the mandible and the favorite site was the molar region rather than anterior portion. The involvement of multiple teeth was the characteristic feature of the lesion. 4. The swelling of the jaw bone was the main symptom in all cases. 5. By the histopathological classification of cementomas all cases were involved n intermediate or mature inactive stage.