An ink-jet head includes a nozzle plate in which a nozzle positioning hole is formed, a front end in which a cover plate and a cavity plate provided with a first and a second positioning holes are disposed at both ends, and a reservoir in which a reservoir positioning plate provided with a reservoir positioning hole is disposed at one end. In method of the manufacturing of the ink-jet head, a first positioning pin is fitted in the nozzle positioning hole and the first positioning hole. The nozzle plate and the front end are positioned and are bonded. Then, a second positioning pin inserted through the first positioning hole and the nozzle positioning hole is fitted in the second positioning hole and the reservoir positioning hole, and the front end and the reservoir are positioned and are bonded.