The purpose of this study was to understand the effectiveness of sexuality education training on the parents in the group regarding their sex knowledge, awareness of sexuality education, attitude towards sexuality education, self-efficacy in sexuality education, communication effectiveness and communication behavior in the hope that they would be able to talk to children about sex issues. The 6-week training program for 92 parents, 2 hours per week, included parental roles in sexuality education, the adolescence, gender roles, boy-girl relationship, HIV/AIDS & STDs, and experience sharing and feedback. The design of the program emphasized knowledge and skills, especially on the part of the parents, whose homework is designed to possess the ability, topics and directions to communicate with children on sex-related issues at home. In addition, the sufficient time and the design of the content catered to the needs of the group members. This program fosters the extension of sexuality education in which the parents with learned knowledge and developed teach, guide and communicate with their children on sex-related issues. (Contains 6 tables.)