A method for producing a liquid-jet head comprises the steps of: forming a vibration plate and piezoelectric elements on one surface of a passage-forming substrate, and removing the vibration plate in a region to be a communicating portion, thereby forming an exposed portion; forming a wiring layer on the passage-forming substrate within the exposed portion, and forming lead electrodes; bonding a reservoir forming plate to the one surface of the passage-forming substrate; wet-etching the passage-forming substrate at the other surface thereof to form pressure generating chambers and the communicating portion; forming a liquid-resistant protective film on inner surfaces of the pressure generating chambers and the communicating portion; removing the protective film within the exposed portion; and performing wet etching on the communicating portion side to remove the wiring layer, thereby establishing communication between a reservoir portion and the communicating portion.