Purpose: The purpose of this study was to develop an integrated internet addiction prevention program and test its effects on the self-regulationand internet addiction of elementary students who are at risk for internet addiction. Methods: A quasi-experimental study with a nonequivalentcontrol group pretest-posttest design was used. Participants were assigned to the experimental group (n=28) or control group(n=28). Contents of the program developed in this study included provision of information about internet addiction, interventions for empowermentand methods of behavioral modification. A pre-test and two post-tests were done to identify the effects of the program and theircontinuity. Effects were testified using Repeated measures ANOVA, simple effect analysis, and Time Contrast. Results: The self-regulationof the experimental group after the program was significantly higher than the control group. The score for internet addiction self-diagnosisand the internet use time in the experimental group were significantly lower than the control group. Conclusion: The effects of the integratedinternet addiction prevention program for preventing internet addiction in elementary students at risk for internet addiction were validated.