Liquid ejection head and liquid ejection recording device

A liquid ejection head comprising:

• an ejection surface having a plurality of ejection opening sets that are equally spaced apart from each other in a given direction, each of said ejection opening sets consisting of at least two ejection openings that are adjacent to each other in said given direction;
• a plurality of pressure chambers;
• a plurality of individual liquid channels connecting each of said pressure chambers to a corresponding one of said ejection opening sets;
• and
• an ejection energy applier configured to apply an ejection energy to a liquid stored in selected at least one of said pressure chambers so as to cause liquid droplets to be ejected through at least one of said ejection opening sets that are connected to said selected at least one of said pressure chambers, such that the liquid droplets ejected through said at least two ejection openings constituting each of said at least one of said ejection opening sets cooperate with each other to form a single pixel,
• wherein said at least two ejection openings of each of said ejection opening sets are positioned relative to each other, such that a straight line that is defined to connect between centers of said respective at least two ejection openings is parallel with said ejection surface and is inclined with respect to said given direction and a perpendicular direction that is perpendicular to said given direction, and such that said straight line defined in one of each adjacent two of said ejection opening sets, which are adjacent to each other in said given direction, and said straight line defined in another of said each adjacent two of said ejection opening sets, are inclined with respect to said perpendicular direction, in respective directions opposite to each other.