A piezoelectric ceramic composition comprises a composite perovskite type oxide of Pb(Ni 1/3 Nb 2/3 )O 3 and simple perovskite type oxides of PbTiO 3 and PbZrO 3 as main components. The composition range of the main components exists in an area surrounded by lines for connecting respective composition points, i.e., a point A (X = 40, Y = 37, Z = 23), a point B (X = 36, Y = 37, Z = 27), a point C (X = 33, Y = 40, Z = 27), and a point D (X = 37, Y = 40, Z = 23) in a triangular coordinate system defined by apexes of Pb(Ni 1/3 Nb 2/3 )O 3 , PbTiO 3 , and PbZrO 3 , provided that Pb(Ni 1/3 Nb 2/3 )O 3 amounts to X molar %, PbTiO 3 amounts to Y molar %, and PbZrO 3 amounts to Z molar %. The composition makes it possible to realize a large strain amount while suppressing the relative dielectric constant to be low. The composition is preferably usable for an piezoelectric actuator of an ink-jet head.