This study is to explore the reason of food prohibited or recommended to intake during pregnancy and to identify the meaning of discourse on the effects of its violation on the pregnant mother and future baby in prenatal education of Korean tradition. For this purpose, I reviewed the classical literatures on ‘Tae-gyo-shin-gi’, ‘Gyu-hap-chong-seo’, and ‘Dong-ui-bo-gam’. Futhermore, I examined the books of the national reports on local folklores. The result shows that reason of food prohibition and recommandation has the rationality based on old wisdom from accumulated life experience as written in ‘Bon-cho’, the classics of foods and medicine materials. However, the discourse on the effect of violation in food prohibition has no scientific evidence. It has the symbolic meaning that maximizes the concern and afraidness of pregnant mother who are not willing to break these prohibitions.