A sheet conveying apparatus (5C, 5M) comprising: a first conveying unit configured to convey a sheet in a first sheet conveying direction; and a second conveying unit arranged on a downstream side of the first conveying unit in the first sheet conveying direction and configured to convey the sheet conveyed by the first conveying unit in a second sheet conveying direction different from the first sheet conveying direction; wherein among the first conveying unit and the second conveying unit, at least the second conveying unit comprises a holding/conveying unit with a holding section for holding and conveying the sheet and comprises a moving/guiding unit arranged along the outer side of a sheet conveying path extending between the first conveying unit and the second conveying unit, the moving/guiding unit being configured to move/guide the sheet toward the holding section of the second conveying unit, characterised in that the moving/guiding unit is a belt conveying unit provided with a plurality of belts configured to convey the sheet toward the holding section, wherein the leading edge of the sheet conveyed by the first conveying unit is in contact with the belts, which are spaced a part at discrete portions along the sheet width direction, wherein the sheet width direction runs orthogonal to the sheet conveying direction, so as to contact at least one part of the sheet in the sheet width direction; and in that the sheet conveying apparatus (5C, 5M) further comprises guiding member having a guide surface for guiding the conveyed sheet arranged between the plurality of belts in the sheet width direction, where the belt conveying unit is located and near the sheet conveying path, a second conveying guiding member arranged along the outer side of the sheet conveying path extending between the first conveying unit and the second conveying unit having a guide surface curved in a caved-in shape, in accordance with the first conveying guiding member, wherein the second conveying guiding member is spaced apart with a predetermined gap from the guide surface of the First conveying guiding member; and a third conveying a first conveying guiding member arranged along the inner side of the sheet conveying path extending between the first conveying unit and the second conveying unit having a curved guide surface, a conveying surface of the belts with which the sheet comes in contact protrudes further inward into the sheet conveying path than the guide surface of the third conveying guiding member, and wherein the guide surface of the second conveying guiding member is arranged in such a manner that the leading edge of the sheet contacts the conveying surface of the belts at portions where the conveyor belts are elastically displaceable / deformable. a first conveying unit configured to convey a sheet in a first sheet conveying direction; and a second conveying unit arranged on a downstream side of the first conveying unit in the first sheet conveying direction and configured to convey the sheet conveyed by the first conveying unit in a second sheet conveying direction different from the first sheet conveying direction; wherein among the first conveying unit and the second conveying unit, at least the second conveying unit comprises a holding/conveying unit with a holding section for holding and conveying the sheet and comprises a moving/guiding unit arranged along the outer side of a sheet conveying path extending between the first conveying unit and the second conveying unit, the moving/guiding unit being configured to move/guide the sheet toward the holding section of the second conveying unit, characterised in that the moving/guiding unit is a belt conveying unit provided with a plurality of belts configured to convey the sheet toward the holding section, wherein the leading edge of the sheet conveyed by the first conveying unit is in contact with the belts, which are spaced a part at discrete portions along the sheet width direction, wherein the sheet width direction runs orthogonal to the sheet conveying direction, so as to contact at least one part of the sheet in the sheet width direction; and in that guiding member having a guide surface for guiding the conveyed sheet arranged between the plurality of belts in the sheet width direction, where the belt conveying unit is located and near the sheet conveying path, a second conveying guiding member arranged along the outer side of the sheet conveying path extending between the first conveying unit and the second conveying unit having a guide surface curved in a caved-in shape, in accordance with the first conveying guiding member, wherein the second conveying guiding member is spaced apart with a predetermined gap from the guide surface of the First conveying guiding member; and a third conveying a first conveying guiding member arranged along the inner side of the sheet conveying path extending between the first conveying unit and the second conveying unit having a curved guide surface, a conveying surface of the belts with which the sheet comes in contact protrudes further inward into the sheet conveying path than the guide surface of the third conveying guiding member, and