A paper-sheet processing apparatus, comprising: a feed unit in which a plurality of paper sheets are stacked; a pickup unit which extracts paper sheets from the feed unit; an inspection unit which inspects the paper sheets extracted; and a stacking unit which stacks each predetermined number of the paper sheets inspected, onto a backup; characterised in that: the paper-sheet processing apparatus further comprises: a backup drive unit which adjusts the position of the backup, depending on a quantity of the stacked paper sheets; a banding unit which bands the stacked paper sheets by wrapping a band around the stacked paper sheets; at least one power supply (12a, 59a, 170a) which supplies electric power to electrically operational parts of the pickup unit, inspection unit, stacking unit, backup drive unit, and banding unit; a mode setting unit which sets a standby mode of temporarily stopping electric power supply to at least one of the electrically operational parts; and a fixing unit (77, 78, 90, 91, 92, 93) which fixes the backup to a position for the standby mode when the standby mode is set by the mode setting unit. a feed unit in which a plurality of paper sheets are stacked; a pickup unit which extracts paper sheets from the feed unit; an inspection unit which inspects the paper sheets extracted; and a stacking unit which stacks each predetermined number of the paper sheets inspected, onto a backup; characterised in that: the paper-sheet processing apparatus further comprises: a backup drive unit which adjusts the position of the backup, depending on a quantity of the stacked paper sheets; a banding unit which bands the stacked paper sheets by wrapping a band around the stacked paper sheets; at least one power supply (12a, 59a, 170a) which supplies electric power to electrically operational parts of the pickup unit, inspection unit, stacking unit, backup drive unit, and banding unit; a mode setting unit which sets a standby mode of temporarily stopping electric power supply to at least one of the electrically operational parts; and a fixing unit (77, 78, 90, 91, 92, 93) which fixes the backup to a position for the standby mode when the standby mode is set by the mode setting unit. the paper-sheet processing apparatus further comprises: a backup drive unit which adjusts the position of the backup, depending on a quantity of the stacked paper sheets; a banding unit which bands the stacked paper sheets by wrapping a band around the stacked paper sheets; at least one power supply (12a, 59a, 170a) which supplies electric power to electrically operational parts of the pickup unit, inspection unit, stacking unit, backup drive unit, and banding unit; a mode setting unit which sets a standby mode of temporarily stopping electric power supply to at least one of the electrically operational parts; and a fixing unit (77, 78, 90, 91, 92, 93) which fixes the backup to a position for the standby mode when the standby mode is set by the mode setting unit. a backup drive unit which adjusts the position of the backup, depending on a quantity of the stacked paper sheets; a banding unit which bands the stacked paper sheets by wrapping a band around the stacked paper sheets; at least one power supply (12a, 59a, 170a) which supplies electric power to electrically operational parts of the pickup unit, inspection unit, stacking unit, backup drive unit, and banding unit; a mode setting unit which sets a standby mode of temporarily stopping electric power supply to at least one of the electrically operational parts; and a fixing unit (77, 78, 90, 91, 92, 93) which fixes the backup to a position for the standby mode when the standby mode is set by the mode setting unit.