Korean people’s staple food is rice. All of Korean people eat rice. But, Many children prefer fast food to rice lately. So, Rice is neglected. But, rice was expensive food and money in the past. Rice was inestimable food until the 5th century. The nobility could eat rice whenever they want, but the common people ate millet and barley. At that time, rice was rarely cultivated. And rice was also used money as increasing output of rice. When people buy something, they paid rice. And, finally, rice became common food in Chosun Dynasty.