Purpose: The purpose of this study was to identify differences in sexual knowledge, attitudes and perspectives of sexual values for female students as these factors related to sexual characteristics. Methods: The participants were 835 girls in junior or high school from Seoul and Kyunggi province in Korea. Data were collected using self-report questionnaires and analyzed using descriptive statistics, t-test, F-test and Scheffe with the SPSS 14.0 WIN program. Results: The major results were as follows: First, for sexual knowledge, there were significant differences for girls from homes with conservative atmosphere and for those who had experiences related to porno. Second, related to sexual attitudes, students who had experience related to porno, were significantly more positive, and had a more open attitudes than students with no experience. Third, for perspectives of sexual value, students who perceived a conservative home atmosphere, who had boy friend, and who had experiences related to porno, had a more positive sexuality, and attitudes towards sexual equality. Conclusion: The findings indicate that it is necessary to develop special sex education programs for both school and parents so that teachers and parents can guide these students appropriately.