Polyamide 11, PA11 is the plant-derived plastic. PA11 is the plastic contributing to prevention of global warming and has high heat-resisting property. Moreover, PA11 has high wear resistance property in plant-derived plastics. So we decided to use PA11. And we want to enlarge the use range of PA11, for example slide materials, and to improve friction properties. We did a variety of experiments to improve its wear resistance. So we decided that purpose is to improve tribological property of PA11 composites by changing type of filler and test condition. Graphite (average particle size: 10µm), Titanic Oxide, TiO2 (average particle size: 250nm) and short carbon fiber, SCF (average fiber length: 3mm) were used for the filler. PA11 and fillers were mixed by using twin screw extruder (Coperion, ZSK18) and we made pellets. After that, pellets were fed into injection molding machine(TOYO MACHINERY & METAL-made, PLASTER ET-40V). And wear tests were conducted by friction and wear tester. Wear surfaces were observed Scanning electron microscopy (SEM) images. As these results, specific wear rate of PA11/SCF decreased 80.3% in comparison with it of unfilled PA11 when pressure was 1MPa, sliding speed was 150 mm/s. According to SEM images of wear surfaces, SCF is covered with PA11. As a reason for that it increases by the improvement effect of the Young’s modulus due to SCF. In addition, every PA11 composite wasn’t better than unfilled PA11 in specific wear rate. Compared to unfilled PA11, specific wear rate of PA11/TiO2 increased 2861.2%. Because effect of filler didn’t function by large wear debris. PA11/Graphite and PA11/SCF stuck on counter surface. Because of Stick-slip phenomenon and aggressive wear.