Health promotion officers at Public health center need to have competition in implementing and managing health promotion programs. This study aims to determine the competence of health promotion officers at Public health center in the aspect of empowering Posyandu cadres for toddlers in Aru Islands District. This research is a qualitative research with a case study approach. The informants in the study were thirteen people who have criteria as main informants and supporting informants. The informants are determined using purposive sampling technique. Data were collected using in depth interviews, FGD (Focus Group Discussion), document review, observation and data were analyzed using constant comparison methods. The results showed that the ability of health promotion officers at the Public health center, both with a background in health promotion education and a non-health promotion background, in the process of empowering Posyandu cadres for the awareness stage of toddlers, have not been able to grow and increase awareness of cadres because activities are still limited to refreshing cadres once a year, guidance and direction to cadres by involving cross-programs at the Public health center. There is a need for training and technical guidance for health promotion officers at Public health center to empower Posyandu cadres.