A liquid ejection head includes a substrate including a first supply port row in which a plurality of supply ports are arranged, a first energy generating element row in which a plurality of energy generating elements are arranged, a second supply port row in which a plurality of supply ports are arranged, a second energy generating element row in which a plurality of energy generating elements are arranged, a first wiring layer and a second wiring layer for driving the energy generating elements, and a through hole configured to electrically connect the first wiring layer and the second wiring layer. The first energy generating element row, the first supply port row, the second supply port row, and the second energy generating element row are arranged in parallel in this order and the through hole is arranged between the first supply port row and the second supply port row.