This is a study about spiral of silence effect in social media, with the concentration to willingness to self censorship and political posting activity behaviour. The condition that showed social media has become a convenient medium to show political opinion of its users had pumped the curiosity of the authors to know about the modified model that impact to spiral of silence effect on social media. This study used quantitative research through the dissemination of cross sectional design online

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... uestionnaire to the daily board of the Student Council in Universitas Indonesia. The collected data then processed by statistical calculations. The result of this study is the spiral of silence effect had a modified model that make it shown among Indonesian social media users, such as Facebook, Twitter, Instagram, Line, and Whatsapp.