What may be achieved through taking up the complex exploration of nature, land, and sustainability is a growing field of inquiry in both science and social science, particularly for those who are interested in the local environment. Meanings of nature, land, and sustainability have been either misunderstood or misrepresented within disciplinary boundaries in many Indigenous communities. To explore the meanings of things such as nature, land, and sustainability in Indigenous communities, we as researchers had better first acknowledge the spirituality and local experiences that connect one actor with other actors. A relational ontology is the conceptual framework within which I suggest meanings of traditional land, nature, and sustainability such as traditional experiences, culture, and customs, are important issues for Indigenous lives and environment. This framework may potentially guide the researcher through the critical concerns of identifying the problems of existing land, nature, and sustainability management in relation to the everyday land-based practices and traditional experiences in Indigenous regions.To explore the meanings of things 1 such as nature, land, and sustainability in Indigenous 2 communities, we as researchers had better first acknowledge the spirituality and experiences that connect an actor with other actors. For this reason, I suggest a relational ontology as a conceptual theoretical framework for working with Indigenous communities in relation to issues of nature, land, and sustainability. This framework suggests that things are materially and spiritually connected through interactions with each other. Such a relational ontology not only challenges Western 3 fixed meanings of actors, but also makes actors responsible for their actions (Wilson 2008). I suggest that a relational ontology can be understood as a "third space". In other words, a relational ontology can be seen as a process of deconstruction and reconstruction (Kapoor 2008, p. 8). Things are actors in such a relational ontology; their interactions are varied, changeable, movable, and co-evolving. Latour, therefore, suggests that both science and social science studies 4 need to reconfigure meanings of "things" and understandings of active actors in concepts of land, nature, and sustainability (Latour 2000).To explain a relational ontology as my theoretical framework, in the first part of the paper, I will develop the framework with regard to various concepts such as relationality, hybridity, otherness, and scientific knowledge. In the second part, I will critically examine the concept of nature, land, and sustainability through my relational ontology.