[[abstract]]The purpose of this research aims to examine the following factors and how they affect junior high school students: (1) the frequency of and correlated experiences of being sexually harassed, (2) definitions of and feelings toward sexual harassment (3) knowledge, attitude, and information background of the prevention of sexual harassment as well as the self-effectiveness of the corresponding reactions to sexual harassment and the requirement for resourceful content of the preventive education. This research took the students of the first semester in the school year 2000 in certain junior high school in Taipei City as a sampling group. By using a stratified cluster sampling method，308 of valid samples were collected with a self-administrated questionnaire. The following conclusions were drawn from the study. (1) The frequency and correlated experiences of being sexually harassed. The result of the questionnaire indicates that about 77﹪of the students have suffered at least one form or another of sexual harassment since they attended junior high school. The ratio of being sexually harassed among boys is a little higher than that of girls. The top three types of sexual harassment behaviors are: verbal abuse regarding the word ‘sex’, visual abuse concerning pornography, and physical abuse such as taking off the victim’s pants. According to the victims, ‘male school mates and friends’ forms the major abusers. The common responses of victims are ‘ignore’ and ‘fight back’. (2) Definitions of, feelings toward and opinions of sexual harassment.The outcome of the survey shows that while more that 50﹪of the students have defined the ten behaviors listed on the questionnaire as sexual harassment, more than 40﹪of the students do not take visual abuse (showing to you pornographic pictures or books) as sexual abuse. Meanwhile, 32﹪of the respondents take visual abuse as no big deal and 23﹪of the respondents do not consider verbal abuse (saying to you in some nasty way concerning the word sex) as sexual harassment. In addition, the survey shows that ‘to have fun or just being naughty’ is the most possible reason incurring the behavior of touching or caressing the sexual organs of their peers. As for the place the respondents suggest that sexual harassments are most likely to occur is ‘the area around school and the dark corners of school’. While ‘parents’ is the help that students are most likely to turn to help when they suffer from the abuse, ‘feeling losing face and wishing to forget about it’ might deter students from reporting their suffering. (3) Knowledge, attitude, and information background of the prevention of sexual harassment as well as the self-effectiveness of the corresponding reactions to sexual harassment and the requirement for resourceful content of the preventive education.The respondents of the questionnaire have an average rate of around 60﹪of correct answers in knowledge part in contrast with more than 50﹪of the students answered wrong concerning sexual harassment myth and related law regulations. While school serves as a major source for providing prevention knowledge, family provides the least help. As for the most required content of prevention course, ‘good personal communication skill’ comes on top of all. ‘Role-play’ and ‘video-show’ remain the favorite learning method and media. Finally, ‘to design a course specialized for teaching the concept of sexual harassment’ is considered the best way to internalize the prevention education of sexual harassment. (4) There are some other factors leading to the differences of the preceding three major conditions.Age, gender, maternal raising attitude, family atmosphere, relations with the opposite sex, the experiences of on-line friend-making, and the experiences of contacting pornographic media influence on the frequency of being sexually harassment. Next, gender and the experiences of contacting pornographic media have an impact on the definitions of sexual harassment. At last, gender, family atmosphere, relations with the opposite sex and the experiences of contacting pornographic media make a difference in the respondents’ feelings towards sexual harassment. (5) Age, gender, paternal and maternal raising attitude and the experiences of contacting pornographic media affect the sexual harassment prevention knowledge. Gender can influence the attitude of the prevention towards sexual harassment. Paternal raising attitude has an influence on the self-effectiveness on the corresponding action of sexual harassment. Also gender and parental raising attitude can determine the information background of the sexual harassment prevention knowledge. And last but not least, age, gender, making Internet friends, and the experiences of contacting pornographic media have an influence on the course content of sexual harassment prevention.