Abstract: In a delivery safety apparatus for a sheet-fed printing press, regardless of the operation mode of the delivery table lifting unit, a delivery table is automatically moved downward on the basis of a detection result from a pile height detecting means for detecting a sheet pile height exceeding a predetermined position for sheets delivered and stacked on the delivery table. If automatic descending of the delivery table is not started even when a predetermined period of time has elapsed, this abnormal state is detected, and an alarm is generated. When automatic descending is not yet started when another predetermined period of time has elapsed after the alarm is generated, this abnormal state is detected to interrupt delivery of sheets onto the delivery table.