Three studies explore the effects of perspective-specific justice sensitivity on indicators of both prosocial behavior (i.e., existential guilt, solidarity, and responsibility ascriptions towards the disadvantaged) and antisocial behavior (i.e., the willingness to transgress a norm in a moral temptation dilemma). On the basis of theoretical considerations and earlier findings it is expected that being sensitive towards injustice from a beneficiary's perspective is associated positively with prosocial and negatively with antisocial behavior, whereas the opposite should be true for being sensitive towards injustice from a victim's perspective. The results from all three studies support these hypotheses. It is argued that JS-beneficiary indicates a genuine, "other-oriented" concern for justice and social responsibility, whereas JS-victim indicates a mixture of "self-related" and justice-related concerns.KEY WORDS: justice sensitivity; prosocial behavior; antisocial behavior; moral concerns.Research on moral behavior has identified several situation and personality factors that contribute uniquely or in interaction to the explanation of moral, prosocial, and norm-compliant versus deceitful, antisocial, and delinquent behavior. Among the most powerful situation factors are behavioral costs and benefits and the presence of others who act as models, exert social control, or contribute to the diffusion of responsibility (Piliavin and Piliavin, 1972;Piliavin et al., 1981;Schwartz, 1977). Studies on deceit (Batson et al., 1997(Batson et al., , 1999Hartshorne and May, 1928) and bystander intervention (Clarkson, 1996) demonstrate how strongly moral behavior depends on the situational context.