In this study, adolescent understanding of and attitude towards unintentional drug use were investigated. 22 elementary, middle and high schools in cities and counties in Jeollanam-do Province were selected randomly and a survey was carried out. 489 students (46.9%) replied that they had received training on drug prevention and 553 (53.1%) said they never received training about drug prevention. That does one or two drugs with curiosity, thinks that is bad(p=0.002), and drug using thought that does not become the help in stress(p<0.001). With regards to the question on whether they would use drugs if suggested by friends, 88.7% answered they would decline the offer. 91.4% indicated they will participate if there is training about drug misuse in the future. 91.0% replied that this training about drug misuse was "satisfaction". Therefore it is be very important to understand the characteristics of adolescent and provide continuous training and campaign to help them to acquire correct habits to maintain good health and in doing so; help them to establish a healthy foundation for adulthood.