This research focused on the dynamics and polemics of conflict of Corruption Eradication Commission and Police of the Republic of Indonesia in the megacorruption case of driving license simulator in 2015. This study analyzes the factors of causing the conflict between state institution and recommendations for government. The purpose of this research is to understanding how Corruption Eradication Commission and Nation Police’s authority should be implemented and prevents the overlapping in the future, as well as providing solutions as a recommendation for the government to consider. By these conflicts found the state losses ranged from 121 billion, with another impact is the formation of unequal public opinion. The result of this research is that the authority conflicts between the KPK and the police, included into the Destructive and Horizontal conflict. According to the type of organizational case, this conflict becomes Conflict between state institutions. Furthermore, it can be concluded that this conflict is a Political conflict between national units. The causes of conflict between KPK and the police are lack of communication and coordination, bad structures that makes bad system of checks and balances, and other personal variables, such as interest.