Patent ID: 7798597

Claim:
An inkjet recording device, comprising: an inkjet head which includes a passage unit formed by a lamination of a plurality of plates and a nozzle plate having a plurality of nozzles, and laminated so that the nozzle plate is positioned outermost of the lamination; and a cap which covers the plurality of nozzles, and includes a circular protrusion forming a recessed portion having an opening broader than the nozzle plate, wherein: amongst the plurality of plates and the nozzle plate, a plate positioned farther from the nozzle plate has a larger plane shape than a plate closer to the nozzle plate so that the passage unit has, around the entire circumference thereof, a stair-like shaped outer circumferential wall; and when the cap covers the plurality of nozzles, the circular protrusion abuts the outer circumferential wall of the passage unit so as to enclose the nozzle plate within the recessed portion.