A thick-film resistor paste comprised of a resistor composition dispersed in an organic vehicle, the resistor composition containing at least one of RuO.sub.2 and a Ru composite oxide as a conductive material, a glass composition, a titanate compound of an alkali earth metal of any of BaTiO.sub.3, CaTiO.sub.3, and SrTiO.sub.3, a metal material, and further optionally CuO and Cu.sub.2O as an additive, the formulation of the resistor composition optimized in accordance with the required resistance value, enabling realization of a thick-film resistor free of Pb and superior in TCR and STOL.
