Entrepreneurship can be defined as the ability to start and run certain ventures, with adequate capital, in the presence of more or less uncertainty and risk. Although it dates from ancient history, during the years the very concepts of entrepreneurship developed significantly, distinguishing several divisions and functions of modern entrepreneurship. At the center of entrepreneurship itself is an entrepreneur, an individual who motivates his idea or vision of realization and transformation in a particular business or set of business activities that ultimately have certain goals. How the realization of the entrepreneur's ideas succeeded, one of the key factors is the development of a quality entrepreneurial project. An entrepreneurial project or plan is elaborated in which the entrepreneur presents his plans, ambitions and ideas, and enables a realistic presentation of the business venture and the expected results. The aim of this paper is to explain the explanation of the function of an entrepreneurial project, how it is used correctly, and its effect on a business venture. An entrepreneurial project will be used as an example on the example of opening a fitness center in the city of Split.