The study aims to prove the influence of local wisdom, learning, attitudes on the intentions and behavior of indigenous peoples in behaving sustainably or preserving forest resources in East Kalimantan Province. The population in this study is customary law communities, namely groups of people who have local wisdom in protecting and managing the environment sustainably in the province of East Kalimantan. The purposive sampling method was used to select districts and villages as sample areas, namely the districts of Berau, East Kutai, and West Kutai with a total population of 12,483. The sample of customary law communities was taken using the nonprobability sampling technique, which includes incidental sampling and purposive sampling of 387 indigenous respondents. Subsequently, in-depth interviews were conducted with 11 customary law community leaders as informants to produce more facts, complete the study description of the phenomenon being studied, and strengthen the research analysis. As a result, local wisdom has influenced the intentions and behavior of indigenous and tribal peoples to conserve forest resources. Learning can increase intention and influence community behavior to conserve forest resources. The attitude of the customary law community in supporting the preservation of forest resources has no effect on the intention to conserve forest resources and the stronger the intention to conserve forest resources, the more it will affect the behavior of the customary law community in conserving forest resources. Furthermore, the perception of indigenous and tribal peoples is that they are very supportive of the preservation of forest resources, forests are seen as an inseparable part of life due to their very high dependence on the economy.