Vertical and horizontal growth occur in craniofacial complex which ensues continuous changes in facial morphology, until the end of active growth period. Longitudinal study for individual is essential, in the research on growth and development, however, the difficulties in obtaining long term subjects in Korea, the research has been limited. The author analyzed the cephalometric roentgenogrems of 43 boys and 47 girls taken from the ages 6 to 10. The subjects were divided into 3 group according to SN-MP angle and 2 group according to gonial angle. In this longitudinal study, 21 variables were measured. The obtamed results were as follows: 1. SN-MP angle and gonial angle had no significant changes in each group with age. 2. With age, facial convexity of hard tissue decreased in all groups, facial angle of hard tissue mcreased in low SN-MP angle group, but facial convexity of soft tissue had no significant changes in all groups with age. 3. In comparison of high SN-MP angle group and low SN-MP angle group, the fromer had greater facial convexity and smaller facial angle than the latter. 4. SN-MP angle and the ratio of posterior dental height to anterior dental height had reverse correlatio in all groups. 5. High gonial angle group revelaed larger SN-MP angle, anterior dental height, facial convexity, but smaller mandibular length, and the ratio of posterior dental height to anterior dental height compared with low gonial angle group.