In this study, We investigated that effect of perceived sense of power and assumed competence on BIS/BAS and displaced aggression. Participants were one hundred forty-one undergraduates and they answered four questionnaires on their university class. As a result, assumed competence did not influence BIS/BAS, and positively influenced displaced aggression directly. On the other hand, perceived sense of power negatively influenced BIS and BIS positively influenced displaced aggression. Perceived sense of power showed indirectly influences on displaced aggression through BIS