The objective of this report is to review the up to present papers including 79 references about functional ingredients in maize and their variations. Maize is a good source of such antioxidants as ${alpha}-,;{gamma}-tocopherols,;{alpha}-,;{eta}-carotene,;{eta}-cryptoxanthin$, zeaxanthin, quercetin and chlorogenic acid. Unsaponifiable standard extracts of Zea mays L. (ZML) have a beneficial effect on various dental diseases. Flavonoids, flavonoid biosynthetic pathway and their controling genes were also reviewed in this report. Flavonoids are required for successful fertilization in maize pollen, and maysin has a potent antibiotic activities to earworm and fall armyworm in maize silks. Maize silks have been used in traditional medicine for diuretic, vascular diseases and diabetes, etc. and boiling water extracts of maize silk have hemodynamic effects, but their ingredients still remain obscure.