Although there is a paradigm shift from the government-based top-down model to community-driven heritage conservation projects in Indonesia, community-based museum’s roles have not been theoretically and practically explored. Utilizing a case study of Museum Pustaka Lontar Dukuh Penaban in Karangasem, this study aims to look back at community-based museum roles in conserving the tradition of Lontar Bali. Employing the living heritage conservation concept by Poulios (2014), this study attempts to put Museum Pustaka Lontar Dukuh Penaban as a core community in the conservation model, based on the criteria of continuity. The museum's roles were examined from the museum’s programs in preserving and contextualizing lontar Bali tradition to the Penaban community. This paper also investigates the potential prospect of engaging community-based museums as a main actor in heritage conservation in Indonesia.