Every country, considered developed or undeveloped, has or strives to have a quality infrastructure that is the foundation of many different activities and at the same time, a prerequisite for further development. Infrastructural project take a long time to be conducted and are generally expensive. Therefore, it is necessary to find a suitable way of financing every specific project. Today’s market economy, including the Republic of Croatia, is characterized by three models of financing the construction, maintenance and exploitation of infrastructure: public (government) funding, private financing and mixed financing (public - private partnership). The application of mixed financing (PPP) uses the technique of project financing, whose basic feature is to develop the project mainly financed through a loan, whose repayment is expected from the income generated by the project, while the project assets are present to secure the repayment. This model of financing the construction, maintenance and exploitation of infrastructure is commonly used in capital - intensive sectors where investors are not creditworthy for traditional financing methods or not ready to take on all kinds of related risks. In this way, project financing plays an important role in the construction or reconstruction of infrastructure facilities and systems, where the relationship between government units and the project company is defined in the concession agreement that determines the rights and obligations of the two parties involved. The project company, in exchange for an agreed fee, has a right to carry out activities for a limited amount of time. These mentioned models of financing and their specific features are described in more detail through the recent examples in the Republic of Croatia.