Kim Ji-suk. 2012. A Study on the Aspect of Diversification of the Myeongtae's Lexical Items from the Viewpoint of Performer. The Sociolinguistic Journal of Korea 20(2). pp. 149-184. This study is to inquire into the aspect of diversification of the Myeongtae's lexical items by way of the vocabularies and expressions related to Myeongtae which varied according to the cognitive aspect of performer. And also, this study is to lay the foundation for the construction of the lexical semantic network of Myeongtae based on the findings of this inquiry. The superordinates referring to Myeongtae were 'Myeongtae, Maengtae' in both the fishing villages and the Deokjang. However, the subordinates of Myeongtae varied according to the performer's cognitive viewpoints. The fishermen expressed Myeongtae into ‘Jibangtae, Daetae, Saegogi, Naksitae, Moktae’ according to distance, size, condition, fishing tools, characteristics. Unlike the fishermen, the workers in Deokjang expressed Myeongtae into another subordinates. In Deokjang, ‘Daetae, Jungtae, Sotae’ were used according to the size as in the fishing villages. However, ‘-tong, -tongbaegi’ were used more universally in Deokjang. Additionally, ‘Jjintae, Norangtae, Naktae’ were used according to condition, color, characteristics, which means another aspect of diversification appeared. Surely, this aspect of diversification is very relevant with the Deokjang workers'environmental factors. It is certain that several classification mechanisms were performed for the name of one object. By way of the performer's cognitive way, the classification mechanism of the vocabulary was able to be drawn. The ‘distance, fishing tools’ for the fishermen and the ‘-tong, -tongbaegi’ for the Deokjang workers were functioned as the first mechanism, and then various lexical items were diversified according to the condition and the characteristics. In this study which carried out a practical vocabulary research, it is found out that linguistic and cultural aspects, the performer's cognition influence on even the lexical items. Also this study examines out the classification mechanism of the Myeongtae's lexical items. This study has a significance in that it is helpful for recognizing everyday vocabularies about Myeongtae which have lived with our people and history for a long time, and also for recording everyday vocabularies of fishing villages which is in danger of extinction.