LIQUID EJECTION HEAD AND LIQUID EJECTION APPARATUS

A liquid ejection head includes a print element substrate having an ejection surface on which an ejection port corresponding to a print element for ejecting liquid is formed and a plurality of ejection port arrays formed of a plurality of the ejection ports are formed and a protective member having a plurality of openings and placed on the print element substrate so that the plurality of openings and the plurality of ejection port arrays are aligned so as to correspond to each other, and one or more print element number identifiers for identifying a print element number assigned to the print element are at a plurality of locations above the ejection port arrays and near an opening on the protective member.