Tali Bamboo is a potential natural fiber for reinforcement environment friendly composites. Synthesis and characterization of particle reinforced polyester composites aimed to reveal the mechanical properties as the main requirements in applications for structural composites. The parameters of the composite synthesis process varied the particle sizes of 50, 100, and 250 mesh, with each mesh varying the volume fractions of 10, 20, and 30 % bamboo particle, respectively. Characterization included tensile and flexural tests, as well as Scanning Electron Microscope observation.. Characterization results showed that tensile strength in a range of 5.69 – 23.89 MPa, yield strength 2.97 - 19.70 MPa, elongation 1.07 - 11.01% and flexural strength 21.71 - 56.05 MPa. Based on the results, the Tali Bamboo - polyester composites met the requirements for structural composites according to SNI 03-2105-2006 . SEM analysis showed the presence of bonding interfaces of bamboo particle dispersed well into the matrix. this had an effect on increasing the tensile strength, yield strength and flexural strength of Tali Bamboo particle reinforced polyester composites.