Manufacturing method of liquid discharging head

A manufacturing method of a liquid discharging head including

• a substrate, in which a liquid supply port is formed, having an energy-generating element on a first face side, and
• a channel forming member configured to form a channel and a discharge port, the method comprising:
• preparing the substrate having the energy-generating element and a resin layer on the first face side;
• irradiating a laser beam on the substrate so as to pass through the resin layer to form a hole serving as the liquid supply port in the substrate;
• removing a portion of the resin layer including a region which the laser beam has penetrated, thereby forming a portion from which the resin layer has been removed as a channel, and forming a portion in which the resin layer remains as a side wall;
• and
• forming a discharge port forming member, after the removing the portion of the resin layer, on a far side from the substrate of the side wall, and to form the channel forming member using the side wall and the discharge port forming member.