A method for manufacturing a liquid discharge head includes a step of preparing a first substrate having an energy generating element at a front surface side thereof; a step of forming a wall member, which is to become a wall for a liquid flow passage, at the front surface side of the first substrate; a step of forming a mask having an opening on the wall member and forming a second substrate, which is composed of silicon and is to become an orifice plate, on the mask; and a step of forming a liquid supply port in the first substrate and a liquid discharge port in the second substrate by supplying an etchant from a back surface side of the first substrate, the back surface being a surface opposite the front surface.