The recognition of public-private partnership as one of the methods for achieving sustainable development goals shifted its regulation to the category of common interests of the states. The subject of this research is the institutional form of international cooperation in the area of public-private partnership, characterized by involvement of multiple international organizations that have regulatory effect upon the relations in this sphere. The results of such impact are quite significant, but at the same time lower than real capacity. Critical assessment along with analysis of the trends and limitations in exercising of regulatory function of international organizations in the area of public-private partnership appear relevant. Application of the methods of comparative analysis, as well as document and social networks analysis, allow forming the conceptual basis for determining the role of international organizations in regulating public-private partnership, problems of their interaction and prospect of future international cooperation in this sphere. The key role of international organizations in the area of public-private partnership consists in influencing the national peacebuilding processes of the states in the area of public-private partnership by unification and harmonization of corresponding legislation and facilitating the process of creating the customary rules of international law in the sphere of public-private partnership. It also implies in transformation of the concept of public-private partnership. The results of regulatory effect of international organizations with regards to public-private partnership are not necessarily identical, as the functions of international organizations on regulating public-private partnership have its limitations, substantiated either by the objective factors of the development of international cooperation in the area of public-private partnership, or mostly by the provisions of constitutive acts of these organizations. The method of overcoming such issues can become the transformation of regulatory function of international organizations and modification of the instruments for its implementation or creation of new ones.