This study aims to provide basic information for conducting reducing children`s dental caries, and proper eating habits and ineffective oral health education activities by survey of children`s oral examination and their mothers based on 9 elementary school at a local area in Gyeonggi Province from May, 4 until July, 20 2009, and the results were as follows: 1. The children`s DMF rate by gender was higher in men than women, the children`s dental caries by grades was higher in higher grades than lower grades, so there were statistically significant differences between children`s dental caries experiences in gender and grades(p<0.05). 2. Mother`s socio-economic characteristics, mother`s detergent food intake frequency, the mother`s protective food intake frequency and the snack consumption etc. had not great effects on the children`s dental caries(p>0.05). In the dental caries experience in children according to the maternal eating behavior, there were the significant differences(p<0.05) between the degree of unbalanced diet in mother and dental caries experience df index in children. Proper eating behavior of balanced diet in mother must take precedence for children`s oral health, and required for their children to have interests about proper eating habits and oral health.