Liquid ejecting head and liquid ejecting apparatus

A liquid ejecting head comprising:

• a piezoelectric element that includes a first drive electrode, a second drive electrode, and a piezoelectric body, the piezoelectric body being provided between the first drive electrode and the second drive electrode in a lamination direction in which the first drive electrode, the second drive electrode, and the piezoelectric body are laminated;
• a vibration plate that is provided on one side of the lamination direction with respect to the piezoelectric element and is deformed by driving of the piezoelectric element;
• a pressure chamber substrate that is provided on the one side of the lamination direction with respect to the vibration plate and is provided with a plurality of pressure chambers;
• an interlayer that is laminated on at least one of the piezoelectric body, the vibration plate, or the pressure chamber substrate and of which resistance changes according to humidity;
• a first detection electrode that is in contact with the interlayer;
• and
• a second detection electrode that is in contact with the interlayer and faces the first detection electrode.