Doping in Croatian combat sports tries to summarize the complex phenomenon of doping in its entirety, especially when it comes to the field of combat sports. Firstly, the paper provides an overview of the most infamous sports doping scandals throughout history and the most common types of prohibited substances. Secondly, it perceives an overview of organizations and institutions that have a regulatory function, as well as sanctions that occur due to positive findings. This study presents the findings of a qualitative research conducted using the in-depth interview methodology on six participants. Participants in the research are current top athletes and coaches who come from judo, ju jitsu, sambo and combat sambo. The aim of the research is to raise awareness of the issue of using prohibited substances in Croatian combat sports in 2021. The research findings show that different athletes perceive doping and its use in different ways, so the answers to the research question on whether doping and its occurrence in sports are exclusively negative also differ. In addition to that, the conducted research provides answers to how different opinions about doping are when it comes to participants in Olympic and non-Olympic combat sports, as well as answers to the question of how athletes valorize their own knowledge about doping.