The article deals with the relevance, experience and problematic aspects of the development of public-private partnership both abroad and in the Republic of Kazakhstan. The experience of developed countries has shown that public-private partnership allows implementing socially significant projects, solving many socio-economic problems of both the country and the regions. This interaction allows us to focus on a larger amount of resources, a fair distribution of risks between public and private partners. Public-private partnership has become an important mechanism for expanding the resource base and mobilizing unused reserves for economic development. It reflects the processes of expansion and complexity of forms of interaction between the state and business. When using the mechanism of public-private partnership, there is an opportunity to increase the efficiency of mutually beneficial cooperation between the state and the private sector, to improve the quality of services provided, to accelerate the modernization of infrastructure, which is necessary for the diversification of the economy. Thus, public-private partnership allows combining the capabilities of the state, regions and business. Its use allows you to link together the resources and capabilities of the state, regions, business, to reduce the risks of project participants, to distribute their areas of responsibility, to coordinate interests. The need for active use of public-private partnership is obvious in many areas of Kazakhstan economy. Public-private partnership as a factor of sustainable socio-economic development, of course, is important and effective, which clearly shows the practice of many states.