Son Hui-Youn 2014. The Meaning of Conversation as a Socio-cognitive Process of the Second Language Acquisition: Analyzing conversation type of microgenesis in the Sociocultural theory's point of view. The Sociolinguistic Journal of Korea 22(1). This study aims to identify conversational phenomenon that shows socio-cognitive process of the second language acquisition. To this end, this study investigated major concepts in the ‘sociocultural theory’s point of view and descriptive methodology based on the ‘conversational analysis'. The analysis data of this study was transcribed by observing the conversations generated in the situation where four Korean language learners from Mongol performing story-making and, interview. Based on this analysis data, this study caught conversational scenes that show the second language development as ‘microgenesis’ phenomena and tried to find the theories of acquisition and conversation organization involved in these conversational scenes. As results of analysis, firstly, this study could see clinical conversation types of microgenetic development generated to complete story-making; secondly, this study could observe cooperative conversational phenomena of microgenetic development accompanied by conversational phenomena such as repair or metaenonciation during the course of interview.