Abstract: Microwave assisted activated carbon from rubber seed pericarp (RSP) was successfully produced by using three different chemical activating agents of ZnCl2, KOH, and H3PO4. The process was carried out at 600W of irradiation power for 20 min. The absorption study was applied for these modified activated carbon samples under cationic methylene blue (MB) dye. The Carbonisation of RSP using ZnCl2 (RSP-ZnCl) as activating agent was found the best as compared among the rest which high BET surface area, total pore volume and iodine number were 1689.00 m²/g, 0.9321cc/g and 883.49 mg/g respectively. The adsorption capacity of RSP-ZnCl under MB was ca. 297.24 mg g-1. This finding showed the feasibility of preparing activated carbon from RSP using ZnCl2 activating agent via by microwave carbonisation technique.