This paper reported some results about synthesis and characteristics of polyaniline/TiO2 composite in different ratios of TiO2-sol-gel/monome by X-ray diffraction, TGA, IR, TEM and conductivity. The result showed that conductivity of composite was increased when decreasing the ratio of TiO2-sol-gel to monome. However conductivity of polyaniline was decreased in the presence of TiO2.