Liquid Discharge Head

A liquid discharge head comprising:

• a pressure chamber plate including a plurality of pressure chambers aligned in one direction, and a vibration film located at one side in a thickness direction orthogonal to the one direction and covering the plurality of pressure chambers;
• a piezoelectric actuator located on a surface of the vibration film at the one side in the thickness direction, and including a plurality of piezoelectric elements overlapping with the plurality of pressure chambers in the thickness direction;
• and
• a protective plate located on a surface of the piezoelectric actuator at the one side in the thickness direction, and covering the plurality of piezoelectric elements,
• wherein the plurality of piezoelectric elements includes a piezoelectric layer extending in the one direction, the piezoelectric layer being common to the plurality of pressure chambers,
• wherein the piezoelectric layer includes a circular recess and an island-like residual part which are located in a portion of the piezoelectric layer overlapping with partition walls in the thickness direction, each of the partition walls being located between the pressure chambers in the pressure chamber plate,
• wherein the circular recess opens at the one side, at least part of the piezoelectric layer in the thickness direction is removed in the circular recess, and the circular recess surrounds the island-like residual part, and
• wherein an overlapping portion of the protective plate overlapping with the island-like residual part in the thickness direction is attached on the island-like residual part.