Korean American made a effort on Korean language education by founding student training school and korean language school under the Korean National Association`s direction from the beginning of the migration. Furthermore, they published Korean textbook for three times-Kookmindokbon(1909), Ch`odung kungmin toksup(1922), and Korean Textbook(1939). In this article, compositional aspect of Ch`odung kungmin toksup, which is the elementary Korean textbook in Japanese colonial era, will be analysed. In the analysis, `feature of unit structure` and `feature of contents` of Ch`odung kungmin toksup has been explored. There are the result of analysis. First, the first volume is for 2～3-year-old child, and can be used at home. The book is written mainly by Korean language with simple illustrations and Chinese alphabets. The second volume includes Korean geology, history, great men in history, famous scenery, and historical remains. The third volume handles more intensified contents on the basis of prior volumes, and contains the contents about foreign history, geology, great men in history, and nature together. Therefore, every volume of Ch`odung kungmin toksup was written for each process to be suitable for level of each child.