 This study investigates the physical, mechanical, and thermal properties of a composite made from rattan and bamboo fiber in a polyester matrix at different fiber loadings 0, 10, 20, and 38%. Better mechanical properties were observed in 38% fiber loading for tensile, flexural, impact, and hardness tests. The composite also showed improved biodegradability and water absorption compared to raw polyester. FDIR analysis was conducted, and thermal stability was achieved at 401.8 degrees Celsius. Phesem was used to investigate surface morphological characteristics. This article was authored by M. D. Rezwan Munchi, S. Shirar Alam, M. Marijul Huck, and others.