In this article, we examined the role of anger in the link between social exclusion and antisocial behavior. We compared the effects of anger to another negative emotion, sadness. In Study 1, social exclusion was associated with feelings of anger, and anger was associated with antisocial behavior. In contrast, sadness was not associated with antisocial behavior. In Study 2, feelings of anger were manipulated by excluding participants for either a fair or unfair reason. Unfairly excluded participants were more angry and were more likely to engage in antisocial behavior than fairly excluded participants. Implications for the study of emotions in the context of social exclusion are discussed.