Existing brake linings generally are made of asbestos materials that are not environmentally friendly and harmful to human health. Therefore a brake non asbestos linings using biocomposite method, utilizing natural materials with matrix polyester is made biocomposite is currently starting to get interest because it is environmental friendly, the availability is good, and has low production cost. The purpose of this research is to make a brake lining out of corncob, aluminum oxide and matrix polyester by doing hardness test, wear test and macro photo on the brake lining. The first process of making specimen is to soak corncobs powder in solution of 10 % NaOH for 24 hours. The composition of corncobs powder is varied for each 25, 35, 45, and 55 % and aluminum oxide compositions is fixed at 25 %. A mixture of corncob, aluminum oxide and matrix polyester poured into the mold and then pressurized 1 ton for 24 hours. Test conducted are macro photos, hardness test and wear test. Specimen test results is compared to Indopart brake lining. The results of research indicate that a higher volume fraction of corncob cause a lower value of hardness but higher value of wear. The variation of volume fraction of 35 % corncob with a value of hardness 91,9 HD and value of wear 1.01 x 10-8 kg/mm2 were approaching the value of hardness and wear of the Indopart brake linings which had value of hardness 93.1 HD and value of wear 1.07 x 10-8 kg/mm2. The results showed that the variation of volume fraction of the brake linings of corncob were approaching the value of hardness and wear of the Indopart brake linings which could be applied on a motorcycle.