This paper analyzes a classroom data of English class on short-term study abroad programme, and focuses on how Japanese students repair their mistakes. Although teachers usually play an important role in correcting students\u27 mistakes in a classroom, students occasionally do amend their utterances. The data shows how the student cooperates with other student in order to repair own mistake by using Japanese Aizuchi (backchannelling). Through the analysis of repairs using Aizuchi in class, it helps teachers understand why communication breakdown occurs and prompts students to achieve communicative competence in their target language
