Anodic coupling of 4,4'(5')-bis[(3,4-(ethylenedioxy)thien-2-yl)]tetrathiafulvalene (1) in acetonitrile has produced a new polythiophene-based polymer containing tetrathiafulvalene (TTF) moieties regularly inserted in the polythiophene chain. The polymer poly(1) has been compared with poly(3-[7-oxa-8-(4-tetrathiafulvalenyl)octyl]-2,2'-bithiophene) bearing the TTF moieties as pendant groups. The polymer films were characterized by cyclic voltammetry, FTIR reflection-absorption and UV-vis spectroscopy, in situ ESR and in situ conductivity. The reversible oxidation of the polymers in two one-electron steps at the TTF moiety displays characteristics which suggest a faster electron transfer and a higher redox conductivity for poly(1).