PURPOSE: To prevent the occurrence of a chip particularly around a deliverly port by a method wherein a delivery port surface is formed by cutting while a distance relation to an ink liquid path and the like is taken into consideration and, thereafter, delivery ports are formed to be connected to the ink liquid paths.

CONSTITUTION: In a primary machining, ink liquid paths 9 are formed by liquid path walls 3 which are formed by pattern exposing, developing, and curing a photosensitive resin. In this state, the tip ends of the liquid paths 9 serving as delivery ports have not been machined into an orifice form. In a secondary machining, orifices 6 are opened on the delivery port surface 8 on positions corresponding to the ink liquid paths 9. As a means for perforating the orifices, for example, a laser beam irradiation is used through a mask regulating the shape and dimension of the orifices. In this manner, the orifices are completed on the tip ends of the ink liquid paths of a recording head. Therefore, chipping around the delivery port and the like can be prevented from occurring.