Arithemetic Enlightenment is written for school beginner and has given much influence to Korea. this article makes a review of fraction in Arithemetic Enlightenment. Difference of the way of thinking between the West and the Orient, fraction in Njne Chapter of Arithemetic, overview of Arithemetic Enlightenment, fraction education in Arithemetic Enlightenment, all of which are described in this article.