The invention relates to a liquid ejection head which can prevent breakdown of a piezoelectric element by reducing stress concentration thereof, and a liquid ejection apparatus. The liquid ejection head includes a channel forming substrate in which pressure generating chambers communicating with nozzle openings are juxtaposed in the transverse direction, and piezoelectric elements provided on one surface side of the channel forming substrate correspondingly to the pressure generating chambers and having a first electrode, a piezoelectric layer and a second electrode, respectively, wherein the first electrodes are provided correspondingly to the pressure generating chambers and independently therefrom, the second electrodes are provided continuously in the juxtaposing direction of the pressure generating chambers, and a low dielectric layer having a dielectric constant lower than that in the central part of an active portion is provided between the first electrode and the second electrode on the active portion side of at least one of the border with a substantially driving active portion or the border with a substantially non-driving active portion of the piezoelectric layer in the direction intersecting with the juxtaposing direction of the pressure generating chambers.