Liquid ejecting head and liquid ejecting apparatus

A liquid ejecting head comprising:

• a wiring substrate;
• a plurality of pressure chambers that accommodate a liquid and communicate with nozzles;
• a drive element that is electrically coupled to the wiring substrate and changes a pressure in the pressure chamber, the drive element being a piezoelectric element including 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 piezoelectric body, and the second drive electrode are laminated;
• a humidity detection section that is electrically coupled to the wiring substrate and is disposed for detection of humidity:
• 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;
• and
• a pressure chamber substrate that is provided on one side of the lamination direction with respect to the vibration plate and is provided with the plurality of pressure chambers, wherein
• the humidity detection section includes
• an interlayer that is laminated on at least one of the piezoelectric body, the vibration plate, or the pressure chamber substrate and whose resistance or capacitance 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.