Patent ID: 8807700

Claim:
A fluid ejection device comprising: a fluid ejection head having a nozzle surface in which fluid ejection nozzles are arrayed; a head cap that covers the nozzle surface; a fluid storage unit in which an ejection fluid that is ejected from the nozzles of the fluid ejection head is stored; a moisturizing fluid supply unit that supplies to the head cap a moisturizing fluid that keeps the head cap moist; a moisturizing fluid storage unit that stores the moisturizing fluid supplied to the head cap from the moisturizing fluid supply unit; and a moisturizing fluid supply control unit that controls the amount of moisturizing fluid supplied to the head cap after the ejection fluid stored in the fluid storage unit reaches a predetermined amount, wherein: until the ejection fluid stored in the fluid storage unit reaches the predetermined amount, the moisturizing fluid supply control unit controls a specific amount of moisturizing fluid supplied to the head cap at a predetermined time.