The purpose of this research is to investigate the implicature comprehension ability of Korean language leaners. The implicature comprehension ability is the most important one of pragmatic competence irrespective of first language or second language. Nevertheless, there was little study on this ability of Korean language learners. So this study examined the ability to comprehend implicatures in L2 Korean. Participants were two groups: advanced-level second language learners (n=42) and Korean native speakers (n=36). The result of experiments show clearly that the difference between two groups was statistically significant, hence implicatures have become educational items of Korean.