The purpose of this study is to describe meaning of ‘-거든’ and how Korean speakers use ‘-거든’. I tried to find semantic and discourse functions of sentence final ending ‘-거든’ in Korean spoken corpus and drama corpus. As the result of analysing, ‘-거든’ has the function to offer the basis of inference to listener. And ‘-거든’ has the function to offer the information of speaker’a area to listener. And speakers intend to make sure of validity or justifiability of their utterances. ‘-거든’ is used as various discourse functions in spoken language. The first, ‘-거든’ has discourse function that speakers offer the basis of informations to listeners when listeners, that is precedent speakers, request informations. And ‘-거든’ has discourse function that speakers offer the basis of order or suggestion to listener. In addition,‘-거든’has discourse function that speakers correct precedent speaker’s utterances or premises. So the speakers use ‘-거든’in common when they make a counter argument. Finally, ‘-거든’is used as functions of offering the basis for pre-utterances or post-utterances. This function play a major role for discourse cohesion and speaker’s utterances maintaining in narratives.