The subject of this thesis work is medical tourism, with special emphasis on the Health resort Istarske toplice. The biggest advantage of this thermal resort is the fact that it is the only thermal resort in Istria County, a county that records greatest success and revenue in Croatian tourism. Proximity to other European countries, developed road and air connections as well as the unique landscape are just some of the tourist features that make Istarske toplice stand out from competitors. On the one hand, research was conducted to determine the typology of the guests while on the other hand, the goal of the research was the determination of the tourist offer satisfaction by the guests as service users and by the employees as service providers. The results showed interesting facts about the need to improve spas in terms of expanding tourism offer, as well as applying for projects to withdraw the investment capital from EU funds, investing in new equipment and in accommodation facilities.