The insignia badge(胸背) was a marker that indicated rank. The king’s badge had a dragon motif on it, and was called the dragon insignia(龍補). This insignia was attached on the king‘s military uniform as well as the royal robe(袞龍袍). In Joseon Dynasty, the military uniform of the king could be categorized into two, yungbok(戎服) and gunbok(軍服). It can be presumed that the king’s yungbok was a red cheollik with a dragon insignia. Examining King Choeljong’s portrait shows that gunbok consisted of dongdari and jeonbok with dragon insignias on its chest, back and the shoulders. The National Palace Museum houses a large number of the paper patterns and wood stamps used making the dragon insignias. Among these, 7 sets were used for gunbok. Most of the patterns have inscriptions that record the year within a sexagenary cycle, users, and uses. This study attempted to identify the exact production date and wearer of dragon insignias by analyzing the patterns used for gunbok as well as the dragon insignia embroidery artifacts and portraits of kings. The oldest insignia was from the year of gapja(1744), and it belonged to King Yeongjo. The dragon on the chest pattern is that of a rising dragon(昇龍), while the rest of the patterns showed a coiled dragon(盤龍) with clouds filling the background. King Heonjong’s year of musul pattern(1838) had dragon patterns that followed the year of gapja patterns, however, additional symbols of world mountain with triple peaks(三山) rising from the waves and precious treaures(寶紋) appeared in the bottom of the badges, with a circular border that marked the boundaries of the insignias. The dragons on the insignia worn by King Gojong in the year of gimyo(1879) were all changed into rising dragons, and the border was made of 24 curvilinear lines. The background followed the year of musul pattern characteristics.