The purpose of this study was to investigate the policy network structure of stakeholder conflicts on the co-hosting issue of the PyeongChang 2018 Winer Olympics. Data were collected from newspapers published from July 2011 to May 2015 when the co-hosting issues had been resolved. Social network analysis were conducted to investigate the policy network structure, including each stakeholder group`s policy stance and response strategies, among stakeholder groups before and after the IOC`s Agenda 2020 statement of November 2014. Results revealed that there were 18 and 22 stakeholder groups before and after the announcement of Agenda 2020, respectively. The policy network was changed from the Iron Triangle to the Issue Network after the Agenda 2020. Regardless of time frames, results of centrality analyses showed that PyeonChang Organizing Committee, Gangwon Province, and the IOC were primary actors within the policy network. Consistent with the resource dependency theory, results of component analyses reported that several cliques were emerged to cooperatively oppose the co-hosting after the Agenda 2020 was announced. Overall, the results of the current study provides insightful information in understanding how stakeholder groups strategically act and respond to the critical issues within the policy networks concerning hosting a mega sport event.