A purpose of this paper is to suggest a necessity of construction of economic education for teachers training courses. The acquisition of the teachers' licenses of social studies in junior high school and civics in high school is possibility to study only one course on economics in current law. To train high quality teachers, this paper emphasizes a teaching method to make understanding on market mechanism. This paper, especially, presents necessity to make understanding definitely on demand-curve, supply-curve, price, perfect competition market that is the most important concept of market economy.