An inkjet recording device comprising: a conveyance unit configured to convey a recording medium in a conveyance direction; a carriage configured to reciprocate in a main scanning direction intersecting the conveyance direction; a plurality of ink heads located on the carriage, each ink head configured to eject an ink; at least one pre-processing head arranged upstream of the plurality of ink heads in the conveyance direction and configured to eject a non-colored pre-processing solution; and at least one post-processing head arranged downstream of the plurality of ink heads in the conveyance direction and configured to eject a non-colored post-processing solution, wherein the plurality of ink heads includes a plurality of same-color ink heads arranged to align in the conveyance direction and configured to eject a same-color ink, wherein the plurality of same-color ink heads is arranged at positions different from each other in the main scanning direction and is partially overlapped each other in the conveyance direction, and characterized in that when the plurality of same-color ink heads is set as one set of same-color ink heads, the plurality of ink heads includes a plurality of sets of same-color ink heads arranged to align in the main scanning direction and configured to eject the ink of colors different from each other, the plurality of sets of same-color ink heads each include: a downstream ink head arranged at a position closest to the post-processing head in the conveyance direction; and at least one upstream ink head arranged between the pre-processing head and the downstream ink head in the conveyance direction, and the at least one post-processing head is arranged such that part of the head overlaps with a plurality of the downstream ink heads included in the plurality of sets of same-color ink heads in the conveyance direction, and is arranged at an identical position to one upstream ink head among the plurality of the upstream ink heads included in the plurality of sets of same-color ink heads in the main scanning direction. a conveyance unit configured to convey a recording medium in a conveyance direction; a carriage configured to reciprocate in a main scanning direction intersecting the conveyance direction; a plurality of ink heads located on the carriage, each ink head configured to eject an ink; at least one pre-processing head arranged upstream of the plurality of ink heads in the conveyance direction and configured to eject a non-colored pre-processing solution; and at least one post-processing head arranged downstream of the plurality of ink heads in the conveyance direction and configured to eject a non-colored post-processing solution, wherein the plurality of ink heads includes a plurality of same-color ink heads arranged to align in the conveyance direction and configured to eject a same-color ink, wherein the plurality of same-color ink heads is arranged at positions different from each other in the main scanning direction and is partially overlapped each other in the conveyance direction, and characterized in that when the plurality of same-color ink heads is set as one set of same-color ink heads, the plurality of ink heads includes a plurality of sets of same-color ink heads arranged to align in the main scanning direction and configured to eject the ink of colors different from each other, the plurality of sets of same-color ink heads each include: a downstream ink head arranged at a position closest to the post-processing head in the conveyance direction; and at least one upstream ink head arranged between the pre-processing head and the downstream ink head in the conveyance direction, and the at least one post-processing head is arranged such that part of the head overlaps with a plurality of the downstream ink heads included in the plurality of sets of same-color ink heads in the conveyance direction, and is arranged at an identical position to one upstream ink head among the plurality of the upstream ink heads included in the plurality of sets of same-color ink heads in the main scanning direction. a downstream ink head arranged at a position closest to the post-processing head in the conveyance direction; and at least one upstream ink head arranged between the pre-processing head and the downstream ink head in the conveyance direction, and the at least one post-processing head is arranged such that part of the head overlaps with a plurality of the downstream ink heads included in the plurality of sets of same-color ink heads in the conveyance direction, and is arranged at an identical position to one upstream ink head among the plurality of the upstream ink heads included in the plurality of sets of same-color ink heads in the main scanning direction.