In this research, it is planned to identify the effect of adult education principles of Knowles based first aid training on participants. Accordingly, this study aims to identify academic success of participants and analyze their views related to their first aid knowledge levels before and after the application of first aid training. Also, participants' views about training have been taken after first aid training. Within this context, research problem is: "What is the effect of first aid training on participants? Mixed design research model has been used in this research. Study group of this research include 120 participants from different sectors and institutions who attend first aid training. Within the scope of this study, academic success test, participants' views about their first aid knowledge levels survey and participants' views about training survey have been applied. Within the context of this study, it is concluded that first aid training - which is planned on basis of adult education principles-increases academic success related to first aid topics and that participants' views about their first aid knowledge change in a positive way after first aid training program.