To make an inkjet nozzle approximate the printing face of a sheet, and to enable high-quality printing.

In a sheet digital printer having a sheet conveyance device 33 which comprises a gripper device 33a having a claw 187 for gripping a sheet and a claw base 188, and conveys the sheet, and an inkjet nozzle for applying printing to the sheet which is conveyed by the sheet conveyance device 33, the claw base 188 has a holding face 188a which is inclined so as to approach the printing face of the sheet as progressing toward the upstream side of the sheet conveying direction, the claw 187 has a holding face 187b for gripping the sheet together with the holding face 188a of the claw base 188, and a claw tip is formed so as to be thin toward a fore end so that the claw 187 may not be protruded more than the printing face of the sheet when the claw 187 grips the sheet.