Based on 2012 TCS data, this study examines the relationship between Internet use and political participation in the context of Taiwan society. Results show that online political news use is not a significant predictor of individual-level political opinion expression when the factors of demographical backgrounds, political antecedents, and traditional media use are controlled. Online political news use is negatively associated with campaign participation and willingness to vote in the study. Internal political efficacy is found to interact with online political news use to shape these two forms of political participation. Interaction effects suggest that the relationship between online political news use and campaign participation is more negative among people with higher internal political efficacy, while the relationship between online political news use and willingness to vote is less negative among this group of people.