A liquid-jet head comprising: a plurality of nozzles, comprising first nozzles and second nozzles, all arranged in an array direction; a plurality of pressurized liquid chambers configured to communicate with the respective first nozzles; a common liquid chamber configured to communicate with each of the pressurized liquid chambers, each of the common liquid chamber and the pressurized liquid chambers having a negative pressure of a predetermined value; a plurality of first communicating paths configured to communicate between the common liquid chamber and the corresponding pressurized liquid chamber, the first communicating paths serving as a filter to prevent air bubbles and foreign particles residing in the common liquid chamber from intruding into the corresponding pressurized liquid chamber, the filter having a plurality of openings, the openings serving as a liquid flow path between the common liquid chamber and the corresponding pressurized liquid chamber; and two air bubble discharge chambers, each including a second communicating path configured to communicate with the common liquid chamber having an air bubble remaining part where air bubbles are likely to remain, the air bubble remaining part being located in a region downstream in a liquid flow direction inside the common liquid chamber, and two second nozzles from which the air bubbles and foreign particles having entered via the second communicating path are discharged, the entered air bubbles and foreign particles being discharged from the two second nozzles during a maintenance-restoration operation, wherein each of the openings of the filter having an opening area smaller than an opening area of each of the nozzles, wherein the opening area of the second communicating path in each of the air bubble discharge chambers is larger than the opening area of the first communicating path in the pressurized liquid chamber, wherein two of the second nozzles are arranged in each of the two end regions on opposite sides in the longitudinal direction of the common liquid chamber, wherein the outermost end of the opening of the second communicating path in a longitudinal direction of the common liquid chamber is located outside of the common liquid chamber, wherein the longitudinal direction of the common liquid chamber is along the array direction of the nozzles, such that air bubbles and foreign particles are caused to flow toward each of the two end regions on the two sides of the common liquid chamber and finally into the second communicating path. a plurality of nozzles, comprising first nozzles and second nozzles, all arranged in an array direction; a plurality of pressurized liquid chambers configured to communicate with the respective first nozzles; a common liquid chamber configured to communicate with each of the pressurized liquid chambers, each of the common liquid chamber and the pressurized liquid chambers having a negative pressure of a predetermined value; a plurality of first communicating paths configured to communicate between the common liquid chamber and the corresponding pressurized liquid chamber, the first communicating paths serving as a filter to prevent air bubbles and foreign particles residing in the common liquid chamber from intruding into the corresponding pressurized liquid chamber, the filter having a plurality of openings, the openings serving as a liquid flow path between the common liquid chamber and the corresponding pressurized liquid chamber; and two air bubble discharge chambers, each including a second communicating path configured to communicate with the common liquid chamber having an air bubble remaining part where air bubbles are likely to remain, the air bubble remaining part being located in a region downstream in a liquid flow direction inside the common liquid chamber, and two second nozzles from which the air bubbles and foreign particles having entered via the second communicating path are discharged, the entered air bubbles and foreign particles being discharged from the two second nozzles during a maintenance-restoration operation, wherein a second communicating path configured to communicate with the common liquid chamber having an air bubble remaining part where air bubbles are likely to remain, the air bubble remaining part being located in a region downstream in a liquid flow direction inside the common liquid chamber, and two second nozzles from which the air bubbles and foreign particles having entered via the second communicating path are discharged, the entered air bubbles and foreign particles being discharged from the two second nozzles during a maintenance-restoration operation, wherein