The purpose of this study is to investigate possible correlation between the dental anomalies and site of cleft in cleft lip and palate. In this study, 142 patients who had cleft lip and/or cleft palate were examined. The results are as follows. 1. The incidence of missing tooth was high in the permanent dentition as compared to the incidence in the deciduous dentition. 2. There was not much difference of incidence of supernumerary tooth between deciduous and permanent dentition in the group of patients who had cleft lip and jaw with or without cleft palate. 3. In the group of patients who had cleft lip and jaw with or without cleft palate, the frequency of incidence of cleft sides was higer in unilateral than bilateral cases. And, incidence of left sides was higher than right sides. 4. The type of cleft between central incisor and canine with missing lateral incisor was most frequent in permanent dentition and the type of cleft between central and lateral incisor was most frequent in deciduous dentition. 5. The type of cleft associated with tooth position in deciduous dentition was not almost the same in the succeeding permanent dentition.