A piezoelectric ceramic is provided which comprises a perovskite-based solid solution represented by the formula:Pb.sub.1-a M.sub.a {(Ni.sub.1-b Zn.sub.b).sub.1/3 Nb.sub.2/3 }.sub.x Ti.sub.y Zr.sub.z O.sub.3wherein M represents Ba or Sr and x+y+z=1,the perovskite-based solid solution having, added thereto, La.sub.2 O.sub.3 or Nd.sub.2 O.sub.3, as a metallic oxide of Group A and NiO, Fe.sub.2 O.sub.3, SnO.sub.2 or Ta.sub.2 O.sub.5 as a metallic oxide of Group B. The piezoelectric ceramic of the present invention exhibits large value of piezoelectric constant d and high Curie point, so that it is useful as a material of a piezoelectric actuator.