The topic of the thesis is "Quality of service in health and wellness tourism" which will explain tourism focused on the development and current state of wellness tourism in the Republic of Croatia. Wellness is a relatively new phenomenon in the tourist world, the lure is rarely any other form of tourism product. By expanding the season and increasing capacity utilization, wellness is becoming a strategic product and should be treated and nurtured with staff, sales agents and anyone who can directly or indirectly participate in product sales. Although the potential of wellness and other forms of health tourism in the Republic of Croatia is underutilized, it can be confirmed that there is a complex structure of wellness tourism in the Republic of Croatia. However, the growing trend of this form of tourism is certainly a good motive for further research. The theoretical part of this paper will talk about international tourism, that is, the impact of globalization processes on world tourism trends and tourist activities, and the base of the work will be to analyze the wellness tourism market from its inception, application, characteristics, concept and elements, and finally who are the segments that use this tourism garden. This thesis presents the key elements of the development of wellness tourism in this region, to what extent they are applied, and how the tourist market of the Republic of Croatia adopts this trend of tourism. The study was conducted on 110 subjects in the Republic of Croatia. This research gives a small sense about the knowledge of Croatia's existing potentials and the possibility of further developing its wellness offer. The paper confirms the thesis that the quality of the wellness offer affects the price of the wellness product, as well as the thesis that the quality of the wellness offer affects the speed of service provision.