This paper discusses optimizing the development of ecotourism based on local wisdom on Gili Iyang Island, Sumenep. Methodologically, the type of research used in this research is descriptive qualitative, with data collection techniques of literature study (reading books, journals, magazines, newspapers, documents, and other media information that has to do with being researched). In addition, researchers also conducted observations and interviews. The results show that tourism potential has not been utilized as an opportunity to improve the welfare of the community. All aspects are still in the medium and low categories, so it can be said that they are not optimal. Therefore, environmental conservation is very important so that tourism objects on Gili Iyang can develop. In this case, the concept of tourism that is in line with the role of environmental conservation is ecotourism.