In the current study, effect of sewage sludge ash on the mechanical properties of particle filled composite material is investigated experimentally. The weight rate of sewage sludge ash which would be applied tensile test, three point bending test, and impact test is changing between 0 % and 45 % of overall mixture. Tests are made in mechanics laboratory and for tensile test and three point bending test, the speed of test machine is adjusted as 1 mm/min and 2 mm/min respectively. According to the result of three point bending test, maximum stress tends to decrease with increased rate of sewage sludge ash in the composite. According to the result of tensile test, maximum stress tends to increase with the sewage sludge ash particles content up to 20 % ratio of overall mixture and beyond that ratio it tends to decrease. According to result of impact test; impact resistance increase until weight rate of ash reaches 10 %. The impact resistance decrease between the weight rate of ash 10 % and 25 % and then impact resistance remains constant until rate of ash reach 40 %.