Lee, Choong-wu The major purpose of using language is to communicate. At this time, lexeme become the communication transmitting way. Using language which express well is impossible without vocabulary that can use properly. And as you can't understand language without vocabulary competence, the education of vocabulary is very important in Korean language education whose major purpose is to expand language usage competence. A purpose of vocabulary education is expansion of vocabulary competence, and vocabulary competence is the basic of study. Because if you don't know vocabulary which was used in materials for study, understanding the materials is impossible and it makes you can't knowledge acquire. So the understanding of related vocabulary is essential to get knowledge of whole subject and vocabulary for understanding related subject punctuate as basic competence of related subject. 【Key words】 vocabulary education, vocabulary competence, communicative competence.