Charge transport mechanism of doped conducting polymers has been attracting much attention both from scientific and technological points of view, whereas it remains many controversial issues not solved yet. Relationship between electrical conductivity and Seebeck coefficient is one of the unresolved matters, each of which has been explained by the different transport models even in the same doped films in many previous works. In this study, we have measured temperature dependence of electrical conductivity and Seebeck coefficient in an electrochemically-doped semicrystalline conducting polymer. the electrical conductivity in highly doped film exhibits a metal-like temperature dependence at high temperature region, whereas it undergoes insulating behavior by weak localization or variable-range hopping (VRH) mechanisms. On the other hand, the Seebeck coefficient in such films exhibits superlinear temperature dependence, which cannot be explained by either metallic or VRH model. We propose that thermal activation of the metal-like domains can explain the temperature dependence of both electrical conductivity and Seebeck coefficient.