This article provides a focused analysis of perceived procedural fairness, including both its predictors and effects, within a context of moderated online deliberation. The article starts with a theoretical discussion about the concept, procedural fairness, against the background of deliberative democracy. Furthermore, the potential competitive relationship between procedural fairness and disagreement is reviewed in light of previous empirical evidence. The findings are made up of two parts: First, the predictors of perceived procedural fairness were explored among demographic variables, political involvement, and discussion activities. Second, the effects of perceived procedural fairness and perceived disagreement on outcomes such as enjoyment, satisfaction with group decisions, as well as intention of future participation are shown. A discussion on the roles of procedural fairness and disagreement in deliberation as well as the importance of experience in political participation is provided at the end of this article.