This book chapter examines Indonesia’s influence as a middle power in the Association of Southeast Asian Nations (ASEAN), focusing particularly on its regional initiatives since the early 2000s. In light of the shortcomings in the extant position, identity and behaviour approaches in the middle power literature in assessing Indonesia’s status, the chapter draws on the idea that middle powers could be norm entrepreneurs and applies this framework to explore Indonesia’s influence in its promotion of democracy and the Indo-Pacific concept in ASEAN.