The purpose of this study is to develop and examine the effects of a parents participatory group counseling program for the prevention of elementary school age internet addiction. The program was developed in 4 phases : objective outlining, organizing program components, pilot program and evaluation, and finally implementing a main program and modifying it. During the organizational phase, a literature review was conducted, and as well as collecting activities on self esteem, self control and communication, consultation(s) with a certified counselor was carried out. The second phase involved the researcher and a group counselor conducting a pilot program, where the group counseling sessions were audio recorded and analyzed. Upon analyzation the program was modified, and a final version of the program was developed and composed in 6 sessions for children and 4 sessions for parents. In the main study, the group participants are 42 children with 5-6 grades and 7 parents. Before and after the program, participant were evaluated in relation to self-control, self-esteem, open communication, and dysfunctional communication were conducted, ANCOVA and Mann-Whitney U Test was performed to test the program’s effects. The Result shows that this program has an effect of elementary school student's change of self esteem and dysfunctional communication. Especially, The parents-child participatory group shows significantly higher scores in self-contol and functioning communication than the non-participatory group. Implications of the results and suggestions for future studies are discussed.