This research analyzes the impact of economic inequality on citizens' political participation in Korea. Considering the findings of previous research and theoretical arguments, we identify the manner in which economic inequality has affected political participation in Korea. First of all, we examine recent research trends in the areas of income inequality, asset inequality, voter turnout, and protests by utilizing various collective data illustrating the degree of economic inequality and political participation. Through this, we identify the macro trends between economic inequality and political participation, and derive several tentative hypotheses. Statistical analyses show that when economic inequality worsens, chances of participating in both voting and non-electoral political activities increase. This confirms that there is a little more evidence to support conflict theory. The findings of our research raise concerns that the issue of political representation of the poor is becoming increasingly serious, and that this could worsen in the future. In conclusion, this research suggests some ways to prevent the lack of political representation of the poor.