The present study was intended to investigate the effects of social role on the perception of social event('Kang Gyong-Dae' event). It was hypothesized that the social roles would be showed consistent differences to attitude toward trial of combatant polices related to the event, attribution, global attitude and the judgement of punishment level to the 'Kang Gyong-Dae' event. In order to examine this hypothesis, When the Subjects were given a treatment of social roles-a combatant police and a demonstration student, the consistent differences appeared in the interpretation of the event. As a result, In the attitude toward trial of arrested combatant polices because of the event, The combatant police roles group judged them guiltless, but the demonstration student roles group judged them guilty. In the attribution to the arresting of the polices, The combatant polices roles group was attributed to the roles, but the demonstration student roles group was attributed to the personal disposition. In the judgement of punishment level, the demonstration student roles group judged that extreme pushiment must be give to the people related to the event in comparison with the polices roles group. Thus, in this study was hypothesised that the cause of the consistent difference according to the roles was because of the attribution difference, the personal disposition or the roles. These hypotheses were all confirmed in the results.