This study is to understand Chang-ui construction of the middle Chosun Dynasty through the reconstruction of the blue Chang-ui which was excavated from General Parks tomb. The followings are the results of this study. There are 4 styles in excavated Chang-ui of middle Chosun Dynasty: Two styles seem to belong to the early 17th Century and the other, the late 17th century. The former is classified into 2 styles by the gender of the wearer, the latter is also classified into 2 styles by etiquette of clothing. We can assume that Chang-ui excavated from General Parks tomb was the womans clothing in early 17th century. This Chang-ui(II) differs from other Chang-ui(I) at two points. One is the construction of the trapezoid and triangle gussets on the side seam of clothing. The other is the construction of the narrow width of clothing(23cm). We have found that these two gussets could improve the active aspect of clothing and save materials. It is identified that the green tone was faded from the blue color of Chang-ui according to the calculation of the L*a*b.