This paper explores key drivers and their underlying rationales for infrastructure Public-Private Partnership (PPP) adoption in Sweden. A related aim is to compare the identified key drivers for Sweden in relation to what is known for other countries. Data was collected via semi-structured interviews with 16 Swedish private sector and public sector stakeholder PPP experts. The results reveal risk transfer to the private sector, reduction of total project costs, and increase in investment alternatives as particularly important key drivers in the case of Sweden. In a country comparison of key drivers Sweden was not found to mirror any specific country or group of countries, calling for deeper analysis. Moreover a few underlying rationales put forth for key drivers were in addition to those reported in the literature. This study contributes to the literature by identifying conducive factors for PPP adoption given sparse and infrequent past country use. Hence, the findings should be considered for Sweden and countries similar to it.