The purpose of this paper is to explore some aspects of functional foods and to give an prospective view of the foods. Recently the increasing rate of old ages is very rapid so that the functional foods is demanded as the treatment of cure and health foods for the old ages. Those are the foods which includes such elements as polyphenol, vitamin E & C, 𝛽-carotene, selenium, lycopene, lutein, isoflavon, capsaicin, DHA, lecithin, peptide, dietry fiber, alginic acid, lactic ferments, caffeine, kitin and kitosan, taurine, and phenylalanine. The total amounts of those foods are $ 112 billion in 2001, the American market marks $36.3 billion (32%) and Europe marks $32.6 billion (29%) and Japan marks $27.1 billion (24%), however, Korea marks $11 billion which equivalent to 1%. We are in need to develop the new foods for the antioxidant effect, anti-cancer, the prevention of cardio vascular disease, the control of intestine vacillius, control of diabetes, with those functional elements in order to secure the world market for the functional foods.