The aim of this paper is to analyze sentential intonation of Korean yes/no-question. In Korean, due to the lexical ambiguity of ``wh`` words (as a wh-pronoun or as an indefinite pronoun), one segmental string including a ``wh`` word could be interpreted as a wh-question or as a yes/no-question. The porter carrying a segmental string to its correct meaningful position is suprasgemental factor, that is prosodic feature, precisely sentential rhythmic curve, the intonation. According to the production results I depicted 3 intonational patterns and to the results of perception, 4 intonational error patterns emerging from Japanese Korean learners.