PURPOSE: To easily obtain an ink jet head composed of ceramic body having an ink jet operating unit by a method wherein a pressing board in which an ink jet operating unit composed of an ink supply unit, a pressurizing chamber, ink flowing grooves and nozzle holes, etc. is formed is pressed into a sheet of green ceramic, and then the green ceramic sheet is calcined.

CONSTITUTION: A mold board 2A made of metallic material is placed on the upper surface of a sheet of green ceramic 1 and it is pressed into the green ceramic sheet by a pressurizing means and then it is removed to form a recessed section 3 composed of a pressurizing chamber P, ink flowing grooves R, nozzle holes N, etc. in the green sheet 1. A sheet of ceramic 4 for composing a cover member is overlayed on the upper surface of the green sheet 1 and both sheets 1, 4 are pasted together by thermal pressure adhesion and then they are calcined under oxidizing environment at 1,300W1,600°C. By this method, an ink jet head H composed of ink flow grooves R, nozzle holes N, etc. can be manufactured in a ceramic body 5.