The purpose of this study was to measure the knowledge, attitude and experience in sex for college students in oder to provide basic sex education information. For this study, the questionnaires were given to 316 students in the S college of Kyungi-do and collected during the period from March 22 to May 7, 1999. These results were analyzed statistically by means of frequency, percentage, t-test, one-way ANOVA. The results of this analysis are as follows. 1. The level of sexual knowledge related to sex was relatively high. The level of subjects knowledge was sexual Physiology, Generation Physiology, Venereal Disease and Genital Physiology. 2. The sources of sexual knowledge were friends 26.6%, expert books 23.4%, teachers 7.6%, mass-media 7.6% of subjects obtained. 3. Only 19.3% of subjects thought that pre-marriage virginity should be kept and there was difference of concept between males(3.48%) and females (15.8%). 4. The experience of masturbation was 28.5% of total. The subjects that had not experienced kiss were 51.6% of total. The subjects that experienced sexual intercourse were 76.9% of total and there were difference between both sexes(male: 54.0%, female: 82.6%).