An intermediate unit comprising: a carry-in port through which a medium (M) can be transported into the intermediate unit from a printing unit that ejects liquid to print an image on the medium; a carry-out port through which the medium can be transported to a post processing unit that performs post processing on the medium; and a transportation path that is disposed between the carry-in port and the carry-out port, wherein the transportation path is provided with a group of pairs of first transportation rollers that is provided with a plurality of pairs of transportation rollers , each of which includes a driving roller configured to apply a transportation force in a transportation direction to the medium and a driven roller that is rotated in accordance with the rotation of the driving roller with the medium nipped between the driving roller and the driven roller, and a pair of correction rollers that is positioned on the downstream side of the group of pairs of first transportation rollers in the transportation direction and is configured to correct skew of the medium with respect to the transportation direction; and wherein the pair of correction rollers includes a first roller configured to rotate in a direction in which the medium is transported toward the carry-out port and a second roller configured to be rotated in accordance with the rotation of the first roller with the medium nipped between the first roller and the second roller, characterised in that the first roller includes a surface on which a convex portion is configured to come into point contact with the medium is provided. a carry-in port through which a medium (M) can be transported into the intermediate unit from a printing unit that ejects liquid to print an image on the medium; a carry-out port through which the medium can be transported to a post processing unit that performs post processing on the medium; and a transportation path that is disposed between the carry-in port and the carry-out port, wherein the transportation path is provided with a group of pairs of first transportation rollers that is provided with a plurality of pairs of transportation rollers , each of which includes a driving roller configured to apply a transportation force in a transportation direction to the medium and a driven roller that is rotated in accordance with the rotation of the driving roller with the medium nipped between the driving roller and the driven roller, and a pair of correction rollers that is positioned on the downstream side of the group of pairs of first transportation rollers in the transportation direction and is configured to correct skew of the medium with respect to the transportation direction; and a group of pairs of first transportation rollers that is provided with a plurality of pairs of transportation rollers , each of which includes a driving roller configured to apply a transportation force in a transportation direction to the medium and a driven roller that is rotated in accordance with the rotation of the driving roller with the medium nipped between the driving roller and the driven roller, and a pair of correction rollers that is positioned on the downstream side of the group of pairs of first transportation rollers in the transportation direction and is configured to correct skew of the medium with respect to the transportation direction; and wherein the pair of correction rollers includes a first roller configured to rotate in a direction in which the medium is transported toward the carry-out port and a second roller configured to be rotated in accordance with the rotation of the first roller with the medium nipped between the first roller and the second roller, characterised in that the first roller includes a surface on which a convex portion is configured to come into point contact with the medium is provided. <EOS>