There are many evidences supporting the lack of skills for living in the background of increasing artificial abortion and sex transmitted infection (STI) in adolescents of Japan. World health organization (WHO) has been proposed that educational programs about skill for living are effect for preventing AIDS in teenagers. Especially peer education is strongly recommended foe useful and good for youths. However, there is no report about the effectiveness of peer education in acquiring skills for living.The purpose of this study is to clarify the effectiveness of peer education about HIV/AIDS for acquiring the skill of living in high school students (i.e. : decision making, skill of communication, self esteem). Participants consisted of 12 female and 15 male high school students aged from 16 to 17 years. Also, the peer educators were university students. The results showed that 93.6% were positive answer for peer education technique. There was no statistically significant difference between pre and post peer education in the aspects of decision making, skill of communication, self esteem. There was significance in change of awareness about reproductive health rights (p=0.007). We conclude that only one trial of peer education may be hard to get the skill for living.