Patent ID: 8276899

Claim:
A media-sheet post-processing apparatus that performs post-processing on a media sheet delivered thereto, the sheet media post-processing apparatus comprising: a media-sheet conveying unit configured to convey a media sheet while moving in a media-sheet conveying direction, the media-sheet conveying unit includes: a conveying member that conveys a media sheet; a drive source unit that drives the conveying member and is arranged on a holding member, the holding member being provided on a main body of the apparatus and holding various units; and a drive transmission unit that transmits driving force from the drive source unit to the conveying member; and a move drive unit configured to move the media-sheet conveying unit in the media-sheet conveying direction in such a manner that a difference between an amount that the media sheet is conveyed by the media-sheet conveying unit and an amount that the media-sheet conveying unit is moved is kept constant.