The aim of this work is to investigate the knowledge, attitudes and behavior of student athletes towards sustainable development and to determine whether there is a difference with regard to gender, the scientific field in which they study and the sport they play. The research was conducted in ac. year 2023./24. on a sample of 167 student athletes (61.7% female students and 38.3% male students) studying in various fields of science at the University of Zagreb. The results showed that there is a statistically significant difference towards sustainable development with regard to gender, with female student athletes generally expressing a greater preference for sustainable development compared to male student athletes. The analysis of differences according to the field of science showed that student athletes from the technical field show slightly lower levels of awareness compared to their colleagues from other fields of science. The research also showed slight but valuable differences among student athletes regarding the sport they play. Student athletes involved in aesthetic sports such as gymnastics and dance show a slightly higher awareness of sustainable development. On the other hand, athletes in martial arts and students involved in fitness programs show slightly lower levels of awareness. In conclusion, the conducted research suggests the need for further research to better understand the causes of differences in attitudes and behavior towards sustainability among student athletes.