This paper was written for the purpose of describing in more detail the concept of tourism and marketing and the application of marketing in tourism. Health tourism is becoming increasingly popular nowadays as people strive for peace, rest and dedication to themselves as opposed to the past when the main motive for travel is either sun and sea or active holidays. Stressful and hectic life has expanded the target groups of health tourism, now they are no longer just old and sick, but also young people looking for better mental health. Marketing affects the development of tourism. The five factors of the essence of marketing are the market; needs, desires and demand; products, services and experiences; value and satisfaction; exchanges, transactions and relationships. It is already seen that marketing plays an important role in health tourism. People have their own needs and desires that lead them to a destination where certain tourism facilities and health institutions offer their products and provide services, all of which eventually lead to meeting the same needs and wishes of consumers who return home with new values and experiences. In order to do so, first of all, the company, facility or institution must place and penetrate the tourist market, and in order to get there and ultimately stay there, good relations and communication between all involved entities or marketing holders are needed. Marketing in tourism is explained through the marketing mix on the example of Terme Sveti Martin.