<![CDATA[Exclusive breastfeeding (EBF) coverage in Indonesia remains far below the national target at only 20.7%. Understanding how family, community leaders, and health workers interact to influence mothers requires synthesizing qualitative evidence that captures lived experiences, power dynamics, and contextual meanings. This study aims to synthesize qualitative evidence on the roles and interactions of family, community leaders, and health workers in EBF decision-making in Indonesia. This qualitative systematic review was conducted following the PRISMA 2020 guidelines. A systematic search across Scopus, PubMed, and ProQuest for the period 2010-2025 identified 18 qualitative studies meeting the inclusion criteria. Data analysis employed thematic synthesis, which involved line-by-line coding of extracted findings, development of descriptive themes, and generation of analytical themes. These themes were then conceptually mapped based on Bronfenbrenner's socio-ecological theory to illustrate multi-level interactions. The close family (particularly parents/in-laws) played a dominant role as "tradition holders," often recommending early complementary feeding. Husbands demonstrated an ambivalent role, being either supportive or inhibitory. Health workers acted as educators but were often inconsistent and constrained by limited capacity. Community leaders had a dual role as norm-setters, both supporting and hindering EBF based on traditional beliefs and religious authority. The synthesis generated a "line-of-argument" illustrating how these actors interact across ecological levels, creating a complex negotiation process between biomedical knowledge and socio-cultural traditions that shapes EBF outcomes. EBF decision-making in Indonesia results from complex multi-actor interactions within the social ecology.]]>
