A head lifting lowering device includes: a lifting lowering mechanism that moves a liquid ejecting head, which ejects a liquid, in a first direction in which the liquid ejecting head is lifted/lowered; a frame that supports the lifting lowering mechanism; and an adjusting member that moves the lifting lowering mechanism relative to the frame in a second direction different from the first direction.

An inkjet printing structure includes a crossbeam having a front guide rail and a rear guide rail provided on its bottom surface; a connecting block mounted with a first slider fitting with the front guide rail and the rear guide rail; a first linear motor arranged between the crossbeam and the connecting block; and a lifting device connected to the bottom surface of the connecting block, which includes an inner frame, an outer frame, a third drive mechanism, lifting mechanisms and a synchronizing mechanism. The inner frame moves relative to the outer frame through lifting mechanisms connected to the synchronizing mechanism. A left guide rail and a right guide rail are provided on the connecting block with a second slider installed on the outer frame to cooperate with the left and right guide rails, and a second drive mechanism is provided between the connecting block and the lifting device.

A liquid discharge head unit includes: a liquid discharge head to discharge a liquid in a discharge direction; a support supporting the liquid discharge head; and a coupler to couple the liquid discharge head to the support. The support has an opening into which at least a discharge side of the liquid discharge head is insertable in the discharge direction, the coupler includes: a first contact contacting the liquid discharge head inserted into the opening; and a second contact contacting the support, and the first contact and the second contact are disposed at different positions in the discharge direction.