Head substrate, recording head, head cartridge, recorder, and method for inputting/outputting information

A liquid ejecting head for ejection liquid, includes electric wiring member including a plurality of contact pads which are electrically contactable to a liquid ejecting apparatus; a storing element for storing individual information; a liquid ejection member, provided with an ejection outlet for ejecting the liquid, for ejecting the liquid using electric energy supplied through a part of the plurality of contact pads, wherein the contact pads include an information contact pad (H1302a) electrically connected with the storing element, a voltage source contact pad (H1302c) for supply the electric energy and a grounding contact pad (H1302d), and the voltage source contact pad (H1302a) or the grounding contact pad (H1302d) is disposed at each of both sides of the information output contact pad, with no individual information contact pad which is electrically contactable to the liquid ejecting apparatus, therebetween.