Entrepreneurship is a key factor in sports due to the globalization and increase in competitiveness in the actual labour market. Therefore, it is important to understand entrepreneurial behaviour and distinguish between the two possible types, intrapreneurship and entrepreneurship, because both should be promoted. However, while studies on the entrepreneurial intentions of university students are a consolidated area of study, little is still known about intrapreneurial intentions. Therefore, the main aim of this study is to discover the determinant variables of entrepreneurial and intrapreneurial intentions of sports science students. For that reason, a sample of 183 senior-level sports science students, 23.60% female and 76.40% male with ages ranging between 20 and 41 years old (M = 22.56; SD = 2.70) was analysed. The results showed that the determinant variables of these two types of entrepreneurial behaviour are totally different. In the case of entrepreneurial intentions, the attitude towards behaviour and the perceived behaviour control were the significant determinants, while in the case of intrapreneurial intentions, the entrepreneurial abilities, subjective norm and age were the main determinants. To summarise, the educational university policies used to enhance the entrepreneurial and intrapreneurial intentions of sports science students should be different. Finally, to address this issue, some practical implications were presented.