The purpose of this study was to collect fundamental data for sex education by investigating the actual conditions of sex education, concerns about sex, knowledge of sex and consciousness about sex. The subjects were 212 middle school girls and 219 high school girls in Ggyeong Nam. The results were as follows 1.There was no significant difference between middle school girls and high school girls in knowledge of sex. 2.The most frequently experienced problem concering other sex was about dating and the many consultants were friends. 3.The stimulation of sexual desire was brought by filmㆍTVㆍVTR, andc advertisement, and sex information was acquired from friends or magazines in both schools students. 4.The reason of high school students for needing sex education was to solve moral problems and the reason of middle school students was to solve the anxiety in adolescence. 5.The students wanted their sex educator to be the expert in the field of sex education, home economist and nurse teacher, in order.