The synthesis and properties of novel germole-containing polymers are described. A polymer possessing bis(cyclopentadienyl)titanacyclopentadiene unit in the main chain was prepared by the polymerization of 1,4-bis(1-hexynyl)benzene and a low-valent bis(cyclopentadienyl)titanium(II) complex, generated in situ from bis(cyclopentadienyl)titanium(IV) dichloride and n-butyllithium (2 equiv). The organotitanium polymer thus obtained was converted into a 1,1-dichlorogermole-containing polymer by the reaction with GeCl4, and its further reaction with methyllithium gave a 1,1-dimethylgermole-containing polymer. Optical and electrochemical properties of the resulting 1,1-dimethylgermole-containing polymer were studied by the UV-vis spectra and the cyclic voltammetric analyses, from which the germole-containing polymer was supposed to have a low-lying LUMO level.