Chatting is the new style communication in the point of simultaneous, immediate, non-face-to-face communication using character symbol, which cause often semantic trap. This paper analyze semantic trap which happened in chatting and try to present the alternative proposal of Korean education aspect. ‘Category’ and ‘classification’ is the typical way of showing reality in lan- guage. Generally ‘category’ and ‘classification’ is the easy means to understand reality but language don’t show reality itself. So understanding the objects and worlds in the language category cause gap between the language and the reali- ty. Semantic trap is the comprehension of object and worlds in the language code made by our society and cause blurring effect that obscure the reality. To analyze the semantic trap in chatting, it is necessary to define which case is the semantic trap, this article said three condition to consider semantic trap. First, the case of comprehending someone limited in the language category based on age, sex, place to live and job. Second, the case of expressing fixed judgment and decision based on that prescribed category. Third, that regular judgment and decision cause the communication gap which obstruct the smooth communication process. The analysis result of the chatting material shows the semantic trap happened frequently. So, the education treat is needed to revise a chatting as a authentic communication tool. This paper proposed two things. First, general and macro aspect which means the reinforcement of language awareness. Second, detail and micro aspect which includes ‘approach like reporter’, ‘making category’, ‘not using ambiguous word’, ‘expressing for ’ etc. 【key words】chatting, semantic trap, communication situation, communication gap, Korean education