Abstract: A pepper seed polishing machine consists of a frame made from welded angle iron bars, a polishing mechanism which is a concave made from iron sieve having holes with diameter of 1.5-2 millimeters, and an agitator set. The agitator set consists of three backward curve vane blades welded onto a rotating shaft and is driven by a two-horsepower electric motor via a two V belt-pulley set. Black pepper seed is loaded into a hopper located on top of the machine. After polishing process, the polished seed is unloaded from the machine, while dust and rubbish can be collected separately. Polishing or rubbing off the outer skin of pepper seed resulted from rubbing action between seed to metal and seed to seed. The revolution of the rotor can be changed by changing pulleys' diameter. This results in changing of time required for each cycle of polishing process and polishing capacity as well. After polishing, the pepper seed has much more favorably odor than those polished by the conventional method.