National and international legal acts guarantee everyone the right to hear their case by a competent court. The same principle can be applied to the stage of pretrial investigation, although only a competent investigator or prosecutor can ensure the implementation of an effective investigation. The very process of criminal proceedings is carried out by the general principles of criminal proceedings, among which one of the universal principles is the principle of adversarial. Taking into account the components of the principle of competitiveness, this article is defined as clarifying the place and role of the institution of victim representation in implementing the principle of competitiveness. It is substantiated that to implement the principle of competition in criminal proceedings fully, certain provisions of the current Criminal Procedure Code of Ukraine require revision and certain changes.