The subject of this thesis is social entrepreneurship. Social entrepreneurship is an extremely popular form of entrepreneurship that is practiced around the world. Because of the positive influence that entrepreneurship has and the widespread practice of social entrepreneurship, many authors conduct research and deal with the issue of social entrepreneurship in order to gain a better insight into social entrepreneurship and make their own contribution to the development of social entrepreneurship. The purpose of the thesis is to investigate social entrepreneurship and its specificities. The goals of this thesis are to theoretically process the concept of social entrepreneurship and, on the selected example of the PRONI Center for Social Teaching, show how social enterprise operates. The theoretical part of the paper presents the conclusions and findings of the authors who were engaged in research about social entrepreneurship, and the empirical part of the paper presents a social enterprise from the environment, the PRONI Center for Social Teaching, and the findings obtained during an interview with the executive director of the PRONI Center, Sanjom Vuković. Few selected scientific research methods are applied in the paper: inductive method, deductive method, description method, interview method and case study method. The paper shows the importance of social entrepreneurship for society and the need for the development of social entrepreneurship in the future. On the example of the PRONI Center, it was seen that it is not easy for social enterprises in Croatia to do business in Croatia, but it was also seen that the effort, work and desire to bring changes in society can pay off and that through the practice of social entrepreneurship, people in society can be touched and their lives can be improved and easier.