The epidemic of HIV/AIDS in Indonesia is one of fastest growing among Asian countries. One of the efforts of the government to reduce HIV/AIDS cases is by implementing Information Education and Communication (IEC) which is so-called “Aku Bangga Aku Tahu (ABAT)”. However, the effectiveness of ABAT and its methods have not been evaluated. The aim of this study is to analyze the effectiveness of IEC of ABAT on knowledge, perception, stigma and HIV/AIDS behavioral prevention among selected high school students. This is a quantitative research, using pre-test, post-test, and control group of Quasi Experimental Design. A number of 221 students were chosen using multistage random sampling, divided into groups of single, multiple and control. The results of this study showed that the IEC of ABAT effectively increased knowledge, perception and preventive behavior, but it had not been able to reduce stigma. IEC of ABAT multiple sessions provided higher impact thanthat of the single session (p < 0.05). It is necessary to improve methods of IEC to encourage the improvement of knowledge, perception, and reduced stigma and HIV/AIDS risk behavior.