This paper aims to explain how fake news impacts democracy. This phenomenon is called the post-truth era. The development of information and communication technology is increasing the spread of information so that difficult to distinguish between true and false information. The research method uses normative juridical method, using secondary data obtained through literature study and qualitative analysis. The result and discussion of this research are serious threat from fake news for democracy, because it can cause social cohesion in the community. Some examples of how its impact on the world include the U.S. presidential election 2016, the Brexit referendum in the United Kingdom in 2016 and the 2017 French presidential election.