Resonator, piezoelectric resonance device, and methods of production thereof

A resonator (10) including a piezoelectric element (1); a lead terminal (3) comprised of an electroconductive wire material formed by press working with a tapered receiving groove (12) for holding an end of the piezoelectric element at its top end; and a capacitor (2) connected to the outer circumference of the top end of the lead terminal in a state with the end of the piezoelectric element held in the receiving groove of the lead terminal so as to constitute a resonance circuit together with the piezoelectric element. Preferably, a difference of a coefficient of heat expansion of a piezoelectric ceramic constituting the piezoelectric element and a coefficient of heat expansion of a dielectric ceramic constituting the capacitor is not more than 5 ppm/ DEG C. Preferably, the area of the surface of the piezoelectric element contacting a vibrating space (20) is in a predetermined relation with the frequency band of the piezoelectric element.