This study was evaluate the effects of community based nutrition education program offered to 3rd grade elementary school students. Students enrolled in intervention programs 4 times per class by nutrition teacher & public health center. The subjects were asked to 606 students fill out a questionnaire before and then after completion of community based nutrition education program. After completion of the community based nutrition education program, nutrition knowledge score increased from $5.07{pm}1.65$ to $6.24{pm}1.53$ (p<0.001), dietary attitude score increased from $16.79{pm}2.70$ to $19.52{pm}2.71$ (p<0.001), dietary behavior score increased from $4.79{pm}1.23$ to $5.31{pm}1.14$ (p<0.001). The changes in nutrition knowledge scores were positively correlated with dietary attitude and dietary behavior. Above results showed that community based nutrition education program was effective for the improvement of dietary habits of 3rd grade elementary school students. Therefore this study is suggested effective Community-Based Participatory Research public health program and this program can be used at school and at public health centers.