Purpose: This quasi-experimental study was conducted to develop a media-based reproductive health promotion program (MRHPP) among male high school students and to evaluate its effectiveness. Methods: The ADDIE model (analysis, design, development, implementation, and evaluation model) was used to develop the MRHPP based on Ajzen's theory of planned behavior. The research was conducted using a non-equivalent control group with a pretest-posttest design (experimental group=23; control group=22). The program consisted of six sessions and was conducted twice a week. The participants were assessed through a pre-test, post-test immediately after training (post-test 1), and follow-up after 4 weeks (post-test 2) by using questionnaires. The collected data were analyzed using descriptive statistics, the independent t-test, chi-square test, Fisher's exact test, and repeated-measures analysis of variance. Results: The analysis of the group-by-time interaction showed statistically significant differences attitudes toward reproductive health behavior (RHB) (F=4.09, p=.049), subjective norms of RHB (F=5.31, p=.026), and intention to engage in RHB (F=3.78, p=.016). The effect sizes for attitudes, subjective norms, and intention to engage in RHB ranged from 0.75 (medium) to 1.02 (large) (p<.001) at post-test 1, and those for attitudes and subjective norms of RHB ranged from 0.36 (small) to 0.69 (medium) (p<.001) at post-test 2. Conclusion: The MRHPP was demonstrated to be an effective intervention for promoting reproductive health behavior among male high school students.