The purpose of this study was to investigate the relationship between socio-demographic characteristic and educational satisfaction of lifeguard's participants. To accomplish the purpose, it questionnaire-surveyed with 218 participants who finished the lifeguard educational course of the republic of Korean National Red Cross in 2003. The data was analyzed by correlation and multiple regression. The results are as follows:First of all, there was an high influence of program, cost satisfaction on male compare to female in lifeguard educational participant.Second, there was an high influence of facilities satisfaction in younger lifeguard educational participant.Third, there was an high influence of facilities, instructor, program and cost satisfaction in lifeguard educational participant.Fourth, there was an low influence of instructor satisfaction in lifeguard educational participant's job.Last of all, there was an high influence of program satisfaction in lifeguard educational participant who has more swimming career.