An electroconductive low thermal expansion ceramic sintered body is disclosed which containing a -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 1.010^-7/K at a temperature of 0 C. to 50 C., a volumetric specific resistance of not more than 1.010⁷ cm, and a specific rigidity of not less than 40 GPa/g/cm³.