A piezoelectric device includes: a piezoelectric film having a first surface in contact with a vibrating film and a second surface on the opposite side to the first surface； first and second electrodes that are provided on the second surface of the piezoelectric film and that are disposed at positions away from each other and are short-circuited to each other at a position away from the piezoelectric film； and a third electrode that is provided between the first and second electrodes on the second surface of the piezoelectric film and is disposed at a position away from the first and second electrodes. At least parts of the contours of end portions of the first and second electrodes are defined in parallel to side portions of the third electrode.
