This chapter explores the innovative realm of regenerative medicine, focusing on the synergistic potential of biomaterials and stem cells for repairing damaged musculoskeletal tissues, specifically cartilage and bone. As the prevalence of diseases, injuries, and the effects of aging compromise the self-repair capacity of these vital tissues, traditional therapeutic approaches often fall short of restoring full functionality. This chapter outlines the limitations of current treatments and introduces the foundational concepts of tissue engineering as a promising alternative. By integrating the latest advancements in biomaterial science with the transformative capabilities of stem cells, particularly mesenchymal stem cells (MSCs), this chapter explores how engineered scaffolds can mimic the natural extracellular matrix to support cell adhesion, proliferation, and differentiation into osteoblasts and chondrocytes. This convergence of technologies not only aims to overcome the inherent challenges in cartilage and bone regeneration but also sets the stage for future breakthroughs in creating long-lasting, functional tissue replacements. Through a comprehensive overview of the material properties required for successful tissue engineering, as well as the therapeutic potential of stem cells, this chapter aims to illuminate the path forward in regenerative medicine, offering hope for more effective treatments for musculoskeletal injuries and diseases.