There is provided a method for manufacturing a liquid discharge head that includes a discharge port, a supply path for supplying the liquid to the discharge port, a transparent member, and an absorptive member, wherein the transparent member and the absorptive member include supply path sections that become a part of a wall of the supply path. The method includes bringing the transparent and absorptive member into contact with each other in such a manner that surfaces of both members including the supply path sections are brought into contact with each other in the vicinity of the supply path sections, welding the both members by irradiating the contact portion where the both members are in contact with each other with the laser beam, and exhausting gas from an exhaust path formed on the liquid discharge head in the vicinity of the contact portion at least throughout the welding process.