The objective of this study was to trace and to identify the meaning of jeobli接籬. This word is found as one of the early costume terminologies of China. later the jeobli was introduced to Koguryo. The jeobli of China and Koguryo were included in this study. Sources of information for this research were collected from the written records including visual information from ancient paintings and tumb paintings as well as figurins. The results of important findings and conclusions of this study can be summerized as follows: It was found that the jeobli 接籬 was synonymous with the cheobli 睫離. Also it appeared that it was called baikrosa. It revealed that the word jeobli had different meanings. first, ti was the name of a white hat which was worn by the people of Chin dynasty. It was a white felt hat made of white great plumes and feathers. Second, it was a dialect for maqna, a kind of a veil which was worn by the women of the Northern dynasty. That, it meant the chaikkun, a kind of knot coverings. The jeobli, a kind of a white felt hat, was also used by the people of Koguryo. The jeobli of Koguryo was made of the pig hair from Malgal. It is considered that he shape of this white hat seems to be a kind of conical hat. Also, it was fond that the jeobli as the meaning of chaik kun was worn by the people of Kogure. it was a small white square hat. It was worn by the nobles.