Abstract: An ink-jet printing head comprises a laminated unit integrally formed as a sintered ceramic product and including a bottom insulating plate element, a top insulating plate element, and a piezoelectric plate element between the bottom and top insulating plate element, the laminated unit having a pressure chamber formed at the piezoelectric plate element fillable with an ink, the piezoelectric plate element having electrode layers formed on opposite surfaces thereof surrounding the pressure chamber, the laminated unit also being provided with an orifice in communication with the pressure chamber. The piezoelectric plate element is constituted such that its thickness is reduced upon applying a drive pulse voltage thereto, resulting in a decrease of the pressure chamber volume, whereby an ink-jet drop is ejected from the orifice.