A printing apparatus comprising: a printing cylinder which holds a sheet on a transfer surface and rotationally transfers the sheet in a predetermined direction; four printheads each of which discharges ink of a UV curing type toward the sheet held by the printing cylinder and performs printing on the sheet; a discharge cylinder to which the sheet printed by the four printheads and transferred by the printing cylinder is handed over directly from the printing cylinder and which holds the sheet on an outer peripheral surface and rotationally discharges the sheet in a predetermined direction; a drying device located between the four printheads and the discharge cylinder in a sheet transfer direction, arranged facing the printing cylinder and configured to irradiate the sheet with ultraviolet rays; a sheet supply means for supplying the sheet to the printing cylinder at a predetermined supply position; and a transfer mechanism, which includes the discharge cylinder, for receiving the printed sheet by the discharge cylinder at a receiving position located on a downstream side of the four printheads in the sheet transfer direction, for transferring the sheet to either one of a discharge route through which the sheet is discharged and a reversing route through which the sheet is reversed, and for returning the reversed sheet that has undergone the reversing route to the printing cylinder at a return position located on a downstream side of the receiving position in the sheet transfer direction and on an upstream side of the supply position in the sheet transfer direction, wherein the transfer surface of the printing cylinder is configured to be exposed when the sheet passes between the receiving position and the return position, characterized in that the drying device is only located on a position where a first transfer distance between a printing end position and a drying position is longer than a second transfer distance between the drying position and the receiving position, the printing end position is a position where printing is performed on the sheet by a printhead located on the most downstream side in the sheet transfer direction among the four printheads, and the drying position is a position where the ink is dried by the drying device. a printing cylinder which holds a sheet on a transfer surface and rotationally transfers the sheet in a predetermined direction; four printheads each of which discharges ink of a UV curing type toward the sheet held by the printing cylinder and performs printing on the sheet; a discharge cylinder to which the sheet printed by the four printheads and transferred by the printing cylinder is handed over directly from the printing cylinder and which holds the sheet on an outer peripheral surface and rotationally discharges the sheet in a predetermined direction; a drying device located between the four printheads and the discharge cylinder in a sheet transfer direction, arranged facing the printing cylinder and configured to irradiate the sheet with ultraviolet rays; a sheet supply means for supplying the sheet to the printing cylinder at a predetermined supply position; and a transfer mechanism, which includes the discharge cylinder, for receiving the printed sheet by the discharge cylinder at a receiving position located on a downstream side of the four printheads in the sheet transfer direction, for transferring the sheet to either one of a discharge route through which the sheet is discharged and a reversing route through which the sheet is reversed, and for returning the reversed sheet that has undergone the reversing route to the printing cylinder at a return position located on a downstream side of the receiving position in the sheet transfer direction and on an upstream side of the supply position in the sheet transfer direction, wherein the transfer surface of the printing cylinder is configured to be exposed when the sheet passes between the receiving position and the return position, characterized in that the drying device is only located on a position where a first transfer distance between a printing end position and a drying position is longer than a second transfer distance between the drying position and the receiving position, the printing end position is a position where printing is performed on the sheet by a printhead located on the most downstream side in the sheet transfer direction among the four printheads, and the drying position is a position where the ink is dried by the drying device.