Patent ID: 8851629

Claim:
An image forming device comprising: (A) a first head in which a first nozzle column in which nozzles ejecting first ink are aligned in a predetermined direction is provided; (B) a second head in which a second nozzle column in which nozzles ejecting second ink are aligned in a predetermined direction is provided, and is located on one side of the first head in the predetermined direction; (C) a movement mechanism which moves relative positions of the first head and the second head in the predetermined direction; and (D) a control unit which causes repeated execution of an ejection operation in which ink is ejected from the nozzle while causing the heads to move in the movement direction intersecting the predetermined direction, and a transport operation in which the head and the medium are relatively moved in the predetermined direction, wherein the control unit adjusts a head interval as an interval of the first head and the second head in the predetermined direction by the movement mechanism when the main image using the first ink and the background image using the second ink are overlappingly formed, wherein the control unit adjusts the head interval so that a non-ejection area in which the ink is not ejected between the first nozzle column and the second nozzle column in the predetermined direction is provided, when the main image and the background image are overlappingly formed.