The purpose of this study was to investigate of the sexual behavior, attitude and knowledge of delinquence adolescents. Data were collected by self-report from 224 delinquence adolescents of the juvenile protection and education organizations in Gwangju city from June 18 to 21, 2002 in Korea. The results were as follows； The concern of subjects on sexual education was pregnancy, delivery and miscarriage(17.4%), date with boy-girl mends(13.9%) and sexually transmitted disease/AIDS(13.1%). The experiences of sexual behavior was masturbation(86.5%), sexual intercourse(79.6%), sexual desire(70.0%) and pregnancy(27.6%). There were statistically significant differences between age and contraception(p＜0.05), age and pregnancy(p＜0.05). The average score for sex attitude was 38.32. The average score for sex knowledge was 7.65. There were statistically significant correlation between sex attitude and sexual intercourse(p＜0.01), sex knowledge and intercourse(p＜0.05), sex knowledge and contraception(p＜0.05), sex attitude and pregnancy (p＜0.05), sex knowledge and sexual desire(p＜0.05). In conclusion, juvenile delinquence adolescents should be educated on sexuality continuously to express there sexual behavior patterns with the right morality and knowledge in any sexual arousal situation.