The purpose of this study is to investigate relation between kucha and korea by comparing costume. The results are as follows First, During 5~8th century, wall paintings of Kizil and Kizilkargha showed traditional costume such as cutting hair, lapel coller and fitting sleeve coat, pants, boots, belts and knife. Kumtura were also in 6th, but under the influce of China and Hoehol(回홀) after 7th. Second, Men and women cutting hair except king. they put on cone shaped hat and Kun(군), clothing were made of felt and kun(*). Third, It was influenced by Iran that cutting hair in Silla(新羅) and Kucha. In Silla, round neckline and V neckline were exsisted except lapel collar. Jeweled knife of Silla and Kucha, pattern of kudonglee(金銅履) showed cultural exchange of centural Asia and Korea along the Silk Rood. It is concious that Silla preferred centural asia of texture and jewels by prohibition of costume (A.D. 834).