Abstract: This study is attempt to evaluate the cooperation between Indonesia and South Korea in developing KF-X/IF-X Jets Fighter from the geopolitical analysis perspectives. Indonesia, as the rising military power, attempts to build the military Industry in order to maintain integrity of territory. The cooperation of Indonesia South Korea in Jets Fighter in 2016 is prospected as early entry for air defense industry. Then, this study argues that the cooperation of Indonesia South Korea is vulnerable referred to geopolitical analysis. Therefore, this study explores alternatives for Indonesia in building air defense referred to geopolitical analysis.