This Study in order to review the history of our children's costumes, this study examined the socio-cultural background of Chosun dynasty and then, reviewed children's costumes comprehensively during that period according to their considerations, kinds, colors and patterns. In addition, this study explored the possibility of making use of the characteristics of children's costumes during Chosun dynasty, since it was perceived that if our children should be dressed in a traditional costume designed with some traditional costume characteristics and ornaments, our tradition would be enlivened in their life and spirit. It is results can be summed up as follows; Our traditional costumes consisted basically of Yu(襦), Go(袴). Sang(裳) and Po(袍) and additionally of Headgear(冠帽), Dae(帶), Hwa(靴) or Yi and Beosun, which must prove that the Korean people is cultural people. Our ancestors were dressed first in Yu(襦), Go(袴). Sang(裳) and Po(袍) to be supported by dae(帶). Our traditional costume style was 'front adjustment' or otherwise, left or right adjustment. Commoners' costumes would change after the series of foreign invasions and again during mid-late Chosun dynasty. During the period of King Sukjong, Jeogori was far shorter and smaller, while China was more diversified and voluminous enough to look like a jar.