Today, competition between supply chains occurs and the existence of SMEs as one of the players in the supply chain cannot be ruled out. In order to win the competition, all supply chain players must have the same direction and objectives. Lean-Green and Sustainability practices have been applied to large companies and provide benefits. However, to the best of our knowledge, only a handful of studies have addressed Lean-Green and Sustainability practices in the SME context. The literature review found that there is a lack of comprehensive empirical research studies investigating the impact of Lean-Green practices on the sustainability performance of SME supply chains. Thus, this paper proposes a conceptual model that is expected to provide an overview of the Lean-Green concept and the sustainability of the SME supply chain for further empirical study in developing deeper knowledge about these two practices.