This article is about Sustainable Development Goals (SDGs) and Public-Private Partnership (PPP) in their cohesion. Its focus is on the PPP legal framework in an international environment. The analysis of international and regional organizations as well as existing and potential international legal instruments allows understanding key problems and prospects for the establishment of the international legal framework of PPP. The results of this paper show both strengths and weaknesses of harmonization and unification of the PPP legislation and outline the path of international PPP legislation from soft law to hard law to achieve SDGs and contribute to further PPP development.