The aim of this study is to analyze communicative event of korean classroom through by ethnography of communication. Classroom is a speech community. Thus, it has communicative rules that has to be kept. Learner and teacher who are members of speech community must know this rules to communicate efficiently in classroom. To do this, microscopic analysis and classification has to be done. At first, classified events and analyzed them by communicative components. First, events came out through topic sending and receiving. And according to attitude of receiving, they were rejected or received passively or positively. It reveals that korean-learning students are adult learners who have great communicative competence of their mother tongue. Second, space that learners sit are related to communicative purpose and way of speaking. Third, changing of number of participants indicate classroom is a place that one to many communication happens and learners are beginners. Fourth, every learner uses various channels to join communicative events. (Chonbuk University)