The present research (N = 169) examined the relationship between narcissism and anger response considering the moderating role of social exclusion and the mediating role of hostile attribution bias. For this, social exclusion scenario and inclusion scenario were used, and a total 183 participants were recruited form the U.K using an online platform(Qualtircis). Fourteen responders were excluded for failing the attention check question and the remaining sample of 169 participants. results demonstrated that participants with high narcissism reported a greater level of anger when socially excluded, yet not when socially accepted. Furthermore, we observed the indirect (mediation) effect that the greater level of anger was affected by higher narcissism via higher level of hostile attribution bias in both social exclusion and inclusion conditions, but the indirect effect was stronger in the condition of social exclusion than in the condition of social inclusion. Thus, the strong direct and indirect relationship between narcissism and anger can be found in social exclusion, while the weaker but significant indirect relationship between narcissism and anger via hostile attribution can be also observed in social inclusion. We discuss the implications of the findings and future research directions.