In the context of post-war economic recovery, the problem of institutional support for public-private partnership (PPP) acquires strategic importance. The implementation of the principles of «build back better» and the achievement of the Sustainable Development Goals are becoming the main tasks for which the PPP is a key tool. International organizations and scientists actively support this approach in Ukraine, but the success of its implementation in post-war conditions is conditioned by effective institutional support. The concept of institutional support for public-private partnership consists in creating conditions and mechanisms that regulate the interaction between the public and private sectors for the joint solution of tasks and the achievement of common goals. It includes a strategic block (development of long-term PPP development strategies that take into account the interests of both parties and define common goals and objectives; sectoral plans for the development of public-private partnerships and regional and municipal PPP development plans); normative and legal block (development of clear and stable legislative norms and normative acts that regulate the conditions of participation of public and private partners, their rights and obligations, as well as mechanisms for resolving controversial issues); organizational unit (creation of relevant organizations or committees responsible for planning, management and control of PPP projects); financial block (definition of financing tools for joint PPP projects and mechanisms for the distribution of financial resources between the public and private sectors); information block (creation of communication mechanisms, promotion of trust and cooperation between sectors for effective interaction). The developed concept of institutional support of the PPP includes a system of norms, mechanisms and tools that regulate the interaction of the public and private sectors. Prerequisites, including the state of public finances, political conditions and others, which must be taken into account to ensure the effectiveness of the PPP in the conditions of post-war economic recovery, are specified. These challenges require adequate institutional support for the successful implementation of public-private partnerships in a renewable economic environment.