Method of producing a liquid discharge head

A method for producing a liquid discharge head, comprising a plurality of flow paths in which a plurality of energy generating elements for generating energy to cause liquid to be discharged as a flying liquid droplet are respectively provided, and a plurality of discharge ports respectively communicating with the plurality of flow paths, said method comprising:

• a step of continuously forming a plurality of projections corresponding to an array of the plurality of discharge ports along a longitudinal direction of a film;
• a step of forming a plurality of openings penetrating the projections, in a projecting direction of the projections;
• a step of separating the film in a predetermined size including a portion on which the openings are formed;
• and
• a step of adjoining the film to the liquid discharge head so as to make the openings become the discharge ports by inserting the projections into the flow paths to make engagement therebetween using the film separated in the separating step as an orifice plate of the liquid discharge head.