The conducting composites were prepared by the chemical oxidative polymerization using pyrrole and poly(2,6-dimethyl-1,4-phenylene oxide(PPO) or sulfonated-poly(2,6-dimethyl-1,4-phenylene oxide(SPPO) in chloroform. The pyrrole was protonated and polymerized using iron(III) chloride (FeCl3). The electrical conductivity of PPy/SPPO composites were increased 1 or 2 order with the amount of PPy compared to PPy/PPO composites. The introduction of sulfonic group to PPO results in the coulombic interaction between each phase of composites. As the results, the effect of miscibility was enhanced between each phase. The electrical conductivity was increased up to 2.14 S/cm with amount of 25 wt% PPy.