The incidence of HIV/AIDS is still high and continues to increase. Worldwide, 37.9 million people suffer from HIV, of which 770,000 were reportedly died. In 2019, there were 50,282 HIV cases and 7,036 AIDS cases in Indonesia. Government programs for tackling STIs, HIV, and AIDS have been running in Indonesia for approximately 33 years. The low number of visits for early detection of HIV/VCT is one of the factors that make controlling the incidence of HIV/AIDS difficult. Such challenge has been associated with the lack of competency among the peer educators who are responsible to reach out to the groups with high for HIV/AIDS. This research was conducted to analyze the different dimensions in competence development of HIV/AIDS peer educators. The research design involved a cross-sectional research conducted in the Province of West Sumatra, Indonesia. A total of 43 peer educators was sampled out of the entire population. Data analysis was carried out computationally using SPSS 16 software. This research has made the following findings: 41.9% of the peer educators (respondents) studied in this research was not competent; 37.2% of respondents had poor knowledge; 41.9% of respondents demonstrated negative attitudes; 37.2% of respondents exhibited poor interpersonal communication skills when reaching out to the high-risk groups. There was a correlation between knowledge, attitudes, and interpersonal communication with the level of competence of HIV/AIDS peer educators who are responsible for reaching out to the high-risk groups. It is hoped that knowledge about the different dimensions in competency development of HIV/AIDS peer educators can be used as a reference in establishing competency standards for HIV/AIDS peer educators for effective reach out to high-risk groups.