An electroconductive low thermal expansion ceramic sintered body is disclosed which containing a β-eucryptite phase in a quantity of not less than 75 vol. % and not more than 99 vol. % and having an absolute value of thermal expansion coefficient of not more than 1.0×10−7/K at a temperature of 0° C. to 50° C., a volumetric specific resistance of not more than 1.0×107 Ω·cm, and a specific rigidity of not less than 40 GPa/g/cm3.