The aim was to compare the effect of peer-led and adult-led educational models that deliver educational programs to promote healthy dietary habits among school children. Methods: Pre-test and post-test design was used for group comparisons. The participants were 51 fourth-grade students. The data were collected with a socio-demographic questionnaire, the Children's Dietary Self-Efficacy Scale (CDSS), and the Diet Behavior Scale (DBS). Descriptive, chi-square test, paired sample t-test, Mann-Whitney U test, Wilcoxon test and a Multivariate Analysis of Variance (MANOVA) test were administered for data analysis. Results: No statistically significant difference was found between the groups with regard to pre-test diet scores (p>0.05). After education, diet self-efficacy and diet behavior scores significantly improved in the adult-led group (p<0.05). No significant difference was observed between the groups with regard to post-test diet scores (p>0.05). Conclusion: Use of an integrated educational approach that contains both adult-led and peer-led education can be more effective in the improvement of student's dietary scores.