This thesis explains about advocacy strategy of ForBALI as social movement to the government of indonesia in protecting Benoa Bay from the reclamation project that converts the Benoa Bay as conservation area become a place for tourism. Reclaiming the Benoa Bay is a form of exploitation of Tourism and it also impacts on the function of green area space. ForBALI movement representing the interests of local people assume reclaiming would affect the ecosystem and disturbing local values in Benoa Bay. Environment and Developmental gap issue are the fundamental interest of ForBALI to speak up their opposition to reclamation project, moreover government policies support the investors without considering and public interests. The advocacy strategy of ForBALI analyzed by Boomerang Pattern on Transnational Advocacy Network according to Margareth Keck and Kathryn Sikkink. The writer analyzed focused on advocacy strategy by ForBALI to reject the reclamation project by Information Politics, Symbolic Politics, Leverage Politics, and Accountability Politics. The efforts of advocacy strategy by ForBALI to remind public society about environtment issue and to observe every government policy to suitable of public interests.