Deliberative democracy argues that expanding citizens' participation in public affairs can compensate for the limitations of representative democracy. However, almost all of the arguments for deliberative democracy assume that participants are rational, tolerant and respect others' interests. These arguments rarely take into account the self-interested side of human nature or address how deliberative democracy can resolve the problems of self-interested participation which harms the public interest. Han Fei directly points out the selfishness of human nature and suggests solutions to the problem of self-interested behavior causing harm to the public interest. This article applies Han Fei's thought regarding human self-interest to examine the idealized assumptions of deliberative democracy. The study hopes to contribute to a reexamination of deliberative democracy that could help to resolve its inherent dilemmas and enhance the possibility for its realization in practice.