To develop the tribomaterials based on polymeric materials with high performance for sliding bearings in standby operation pumps, we investigated the effect of addition of filler on the tribological properties of carbon fiber reinforced polyether ether ketone (CF/PEEK) composites. Two types of filler such as (a) the combination of polytetrafluoroethylene (PTFE) and graphite (Gr), and (b) talc (Tc) were used for filler in this study. These CF/PEEK composites filled with various filler were melt-mixed by a twin screw extruder and compression mold. Tribological properties under two types of testing using a ring-on-plate type sliding wear tester under dry condition were evaluated for these composites. Two types of tribological testing were sliding wear testing at constant normal load and sliding speed, and limiting pv value testing by step load method. Frictional coefficient, specific wear rate and limiting pv value improved with the addition of filler. In particular, these tribological properties of CF/PEEK composites filled with Tc (CF/PEEK/Tc composites) were superior to those of CF/PEEK ones filled with PTFE and Gr (CF/PEEK/ (PTFE+Gr) ones). These may be attributed to be due to the change in the mode of wear mechanism, which is the change of form of the transfer films on the metal counterface, the shape of wear debris and the morphology of worn surface, by the addition of filler.