Patent ID: 8016383

Claim:
An image-forming apparatus comprising: a liquid ejection head including a plurality of ejection openings arranged in a first direction and a plurality of ejection energy generating elements for ejecting liquid from the plurality of the ejection openings, to form an image on a printing medium with the liquid ejected from the ejection openings; a mounting portion for the liquid ejection head; a feeding device for feeding the printing medium along the first direction; and a carriage for moving the liquid ejection head along a second direction transverse to the first direction, wherein the plurality of the ejection openings includes opposite end groups comprising the ejection openings located in respective opposite end sections along the first direction, to form the image on the printing medium with the liquid ejected from the ejection openings constituting the end groups, and a central group comprising the ejection openings located in a central section along the first direction, to form the image on the printing medium with the liquid ejected from the ejection openings constituting the central group, wherein at least one of the opposite end groups includes at least three ejection openings arranged in a single line in the first direction, and wherein an arrangement pitch along the first direction of the ejection openings of the end groups is longer than an arrangement pitch along the first direction of the ejection openings of the central group.