Patent ID: 8272721

Claim:
A liquid-drop ejecting apparatus comprising: a liquid-drop ejection head comprising an ejection portion configured to eject a liquid drop; a first tank comprising: a liquid storage chamber for storing therein a liquid to be supplied to the liquid ejection head; a gas chamber formed above the liquid storage chamber in a first direction; a connecting member provided between the liquid storage chamber and the gas chamber in the first direction, the connecting member comprising a communication hole formed therein; a gas-permeable membrane affixed to a first area of a gas chamber side surface of the connecting member so as to cover the communication hole; and a first groove formed in a second area of the gas chamber side surface of the connecting member, which is different from the first area of the gas chamber side surface of the connecting member, at an outer periphery side of the gas-permeable membrane, so as to surround an area where the gas-permeable membrane is affixed; a second tank for storing therein a liquid to be supplied to the liquid storage chamber in the first tank; and a negative pressure generation unit configured to generate a negative pressure in the gas chamber, wherein the first tank further comprises a second groove formed therein and extending from an area where the gas-permeable membrane is affixed towards a bottom of the first groove, the second groove communicating with the first groove, wherein the second groove comprises a plurality of second grooves formed with intervals therebetween so as to align along a periphery of the area where the gas-permeable membrane is affixed, and wherein each second groove has a greatest depth at a gas-permeable membrane side thereof and reduces in depth as the each second groove extends therefrom to approach the bottom of the first groove.