PURPOSE: This investigation was carried out to understand how various gender role identity in adolescence affect sexual intercourse. In addition, it was done to support and encourage gender role identity which can protect themselves from physical, psychological, social sexuality. METHOD: From 2003 7.1 to 7.19, questionnaire made by Lee BS(2002) was distributed to 1172 girl high school students in Seoul. Its reliability was as high as 0.80 and it was analysed by SPSS. RESULT: In the 3 kinds of gender role identity, girls who had sexual relations showed higher feminity and masculinity and did not show any difference in social desirability. in the 4 kinds of gender role identity, girls with sexual experience showed higher frequency in oder of androgyny and undifferentiated. In 8kinds, bisexuality was higher and girls with experience showed undifferentiated of low social desirability. There were no difference between the gender role identity and the age of the first sexual experience. The factors that affected gender role identity were school, grade, economic standard and whether they have a girlfriend or boyfriend. CONCLUSION: Programs that focus on problem solving of sexual education for androgyny of sexually high experienced and undifferentiated of low social desirability, should be provided.