A liquid ejection head includes an energy-generating element arranged on a
semiconductor substrate, a barrier layer deposited on the semiconductor
substrate for forming a liquid chamber in the periphery of the
energy-generating element, and a nozzle sheet bonded on the barrier layer
and having a nozzle formed at a position opposing the energy-generating
element, in which the liquid ejection head ejects liquid contained in the
liquid chamber from the nozzle as liquid droplets by the
energy-generating element, and the barrier layer is provided with a
plurality of depressions, each having an independent contour, arranged
within a range, which is separated from the border of the barrier layer,
on an adhesive region adhering to the nozzle sheet.