The present analysis of the dietary factors affecting ADHD in older elementary students found that children on an unbalanced diet were 14.63 times more disposed toward ADHD than those who maintained a balanced diet. Gender(by 5.68 times), school credits(by 3.80 times), the frequency of breakfast (2.52 times) and the frequency of processed food intake(1.06 times) were associated with a higher disposition toward ADHD. Previous studies analyzed the correlation between ADHD and the dietary factors in line with the disposition toward ADHD without paying attention to the factors influencing ADHD, which is why it is difficult to directly compare the present findings with previous ones. Still the correlational research by Son and Kim[7] reported a higher relevance between ADHD scores in children and their irregular meal time, preference for treats to staples, eating while watching TV, and frequent consumption of ramen and confectionary. Jang and Kim[8] found boys received higher ADHD scores than girls and showed unfavorable dietary habits in regard of breakfast, balanced diet and frequencies of fruit and milk intakes in comparison to non-ADHD students. Notably, they showed a significantly frequent consumption of ramen. Likewise, the higher the ADHD scores, the higher the caffeine intake. In contrast to previous studies analyzing correlations only, the factors found in the present research to affect ADHD should be used for developing nursing intervention programs for ADHD prevention and treatment applicable to older elementary students. Moreover, the effects of such programs need be analyzed by further studies