This study examined the differential effects of 4 types of organizational justice on daily job satisfaction at between- and within-individual levels. Specifically, the authors predicted that interpersonal justice and informational justice would exhibit meaningful daily variations and would have direct impacts on individuals' job satisfaction on a daily basis. They further theorized that distributive justice and procedural justice at a between-person level would moderate the within-person relationships. The authors used hierarchical linear modeling to test their hypotheses with a sample of 231 full-time employees in Hong Kong over the course of 25 working days. The results showed that both daily interpersonal and informational justice were positively related to daily job satisfaction. As hypothesized, between-individual distributive justice moderated the relationship between daily interpersonal justice and daily job satisfaction, and between-individual procedural justice moderated the relationship between daily informational justice and daily job satisfaction.