Patent ID: 7284835

Claim:
An ink-jet head comprising: plural pressure chambers communicating with nozzles and arranged in a matrix form along a plane so that plural pressure chamber lines are formed in one direction on the plane; and a common ink chamber extending in the one direction and communicating with the plural pressure chambers, wherein the common ink chamber is provided with plural ink supply ports which supplies ink in the common ink chamber to individual ink flow paths extending through the pressure chambers to the nozzles, and on a wall surface, in which the ink supply ports are formed, of wall surfaces constituting the common ink chamber, a total area of openings of the ink supply ports formed in areas close to both side ends of the common ink chamber in a direction perpendicular to the one direction is larger than a total area of openings of any ink supply ports formed in a center area other than the areas close to both the side ends; wherein some of the ink supply ports formed close to each of the side ends are connected to some individual flow paths in which ink flows in a first direction inclined with respect to the one direction, and the other ink supply ports formed close to each of the side ends are connected to the other individual flow paths in which the ink flows in a second direction inclined with respect to a direction opposite to the one direction.