This study is designed to suggest how to produce a portrait of admiral Yi Sun-sin wearing a yungbok. Most of his widely known portraits show the admiral who wears a military uniform whose main parts are jeonrip and hyeopsu. However, military clothes of that kind began to be made in the mid or late 17th century, so the appearance of hyeopsu in the portrait of Yi Sun-sin, who lived around the Imjin war, should be reconsidered. Admiral Yi Sun-sin's rank is Jeongheondaebu(Jeong 2 pum), so when reproducing the portrait of yungbok, it is reasonable to reproduce it as the military officer Dangsanggwan yungbok. For the expression of a yungbok wearing portrait of Yi Sun-sin, this study suggests that cheollik should be drawn in indigo blue and depicted in the form of being lined with silk. Additional features of the outer garment that are suggested here include the length ratio of 1:1 to 1:1.17 between the upper and the lower parts discriminated by the waistline, kalgit of typical shape, chaksu sleeves, each of which is detachable, and pleats, each of which is 3cm in breadth. Nam Yu's cheollik would contribute to making the portrait expression more accurate. As lipja, the study recommends jarip featuring mojeong that is round and entirely high and yangtae or the rim that is narrow but downwards enough to cover the ears. Ryu Seong-ryong's heukrip and Kim jin's portrait would help represent the features. Yipsik, or decorations for jarip, this research suggests, include paeyeong, guyeongja, jeongja, and gongjaku. Regarding dae or the belt is suggested as red color. In this case, Gwangsadae excavated from Shin Yeo-gwan's grave would be referable. In making a portrait of Yi Sun-sin, who wears a yungbok, heukhwa is suggestable as his footwear. For more detail, heukhwa appeared in 『Punggongyubodoryak』and jangtonghwa of the Chinese Ming period would be informative. Suggestions that this study makes about how to produce the portrait of Yi Sun-sin wearing yungbok provide helpful primary information to make the admiral Yi's portraits that are drawn in the same way or otherwise standardized fashion in the future.