A sheet transport apparatus, comprising: a transport path which is configured to transport a sheet along the transport path in a transport direction and is provided with a first direction changing roller and a second direction changing roller disposed on one side of the first direction changing roller, wherein the first direction changing roller and the second direction changing roller are arranged in a width direction of the transport path perpendicular to the transport direction of the transport path, and change an orientation of the sheet from a first orientation to a second orientation; and a control section configured to control one of the first direction changing roller and the second direction changing roller such that the first direction changing roller rotates slower than the second direction changing roller so as to change the orientation of the sheet from the first orientation to the second orientation, the sheet transport path further provided with a third direction changing roller disposed on the other side opposite the one side of the first direction changing roller with respect to the second direction changing roller, and a third contact roller disposed facing the third direction changing roller, characterised in that when the sheet is to be rotated, the control section controls the third direction changing roller and the third contact roller to be in contact with the sheet and controls the third direction changing roller to rotate in a direction opposite to a direction of rotation of the first direction changing roller and the second direction changing roller, and when the sheet is not to be rotated, the control section controls the third direction changing roller and the third contact roller to not be in contact with the sheet. a transport path which is configured to transport a sheet along the transport path in a transport direction and is provided with a first direction changing roller and a second direction changing roller disposed on one side of the first direction changing roller, wherein the first direction changing roller and the second direction changing roller are arranged in a width direction of the transport path perpendicular to the transport direction of the transport path, and change an orientation of the sheet from a first orientation to a second orientation; and a control section configured to control one of the first direction changing roller and the second direction changing roller such that the first direction changing roller rotates slower than the second direction changing roller so as to change the orientation of the sheet from the first orientation to the second orientation, the sheet transport path further provided with a third direction changing roller disposed on the other side opposite the one side of the first direction changing roller with respect to the second direction changing roller, and a third contact roller disposed facing the third direction changing roller, characterised in that when the sheet is to be rotated, the control section controls the third direction changing roller and the third contact roller to be in contact with the sheet and controls the third direction changing roller to rotate in a direction opposite to a direction of rotation of the first direction changing roller and the second direction changing roller, and when the sheet is not to be rotated, the control section controls the third direction changing roller and the third contact roller to not be in contact with the sheet.