The purpose of this article is to investigate the differences of the prosodic features according to the discourse functions of ‘kulssey’. This study attempted to analyze more precisely systematically and accurately the prosodic feaatures of ‘kulssey’ by using large-scale TV drama video and voice data. They have been sorted out five discourse functions of ‘kulssey’: unclearness, euphemistic negation, emphasis, attention, agreement. These functions are classified into the strategies of the speech progression, the speaker’s attitude toward the content, and the interaction between speakers and listeners. The prosodic features realized in ‘kulssey’ are analyzed considering the prosodic factors such as position in utterance, tonal patterns, duration, pause. By analyzing these prosodic features realized in ‘kulssey’, It could be revealed the differences in prosodic patterns according to kulssey’s discourse functions. In the unclearness and euphemistic negation, ‘kulssey’ was realized mainly by initial position and alone utterance, relatively long, and the pause was found to have a high frequency. In the emphasis and attention, the type of tone of ‘kulssey’ was realized mainly in H tone. In the case of emphasis function, the complex boundary tones such as HLHL%, LHL% was realized, persuasion and the attitude of irritation and anger were revealed. In the agreement, the first syllable of ‘kulssey’ is realized in high tone and longer than the duration of the final syllable.