The popularity of social media has been increasing. It raised questions about the role of social media in the political process. This study examines that how the use of social media affects voting behavior. This paper is based on a survey(n=930) conducted after the 21th and 23th House of Councilors election. This survey's conclusions are as follows: (1) As a media for acquiring political information, this paper shows that they use the Internet more frequently than newspapers. (2) The result of logistic regression analysis indicates that SNS is one of the significant predictive variable.
