Polycondensation reaction of 1,3-dimethoxybenzene and TeCl4 was performed at a feed ratio of 1,3-DMB/TeCl4 = 1/10 without catalyst in 1,4-dioxane at 60 degrees C for 48h, affording poly(1,3-DMB-co-Te) with M-n = 45100 and M-w/M-n = 1.89 in 75% yield, with release of HCl. H-1 NMR, IR, and X-ray fluorescence spectroscopy indicated that poly(1,3-DMB-co-Te) had a partially branched skeleton. This polymer had good solubility, good film-forming ability, high thermal stability, and a high refractive index (1.769 at 0.6328 mu m).