To provide a piezoelectric ceramic and a piezoelectric resonator, both enlarged in the P/V value of fundamental wave vibration in a thickness- shear vibration and excellent in the temperature stability of resonance frequency.

This piezoelectric ceramic includes, as a main crystal particle, a Bi-layered compound containing Sr, Ba, Bi, Ti and a rare earth metal (Ln) as metallic elements, and is characterized in that Mn is present in the main crystal particle.