PAPER SHEET AFTER TREATING DEVICE AND IMAGE FORMING DEVICE

PROBLEM TO BE SOLVED: To provide a paper sheet after treating device equipped with a paper discharging means having the improved paper sheet aligning performance of a paper discharge device mounted on a paper sheet after treating device, and a simple mechanism. SOLUTION: In a paper sheet after treating device where a image formed paper sheet is carried by a carrying means for a paper sheet after treating device, and then is loaded on an intermediate stacker 31 to be after-treated by an after treating means, and after that, is discharged by a paper discharging means to be placed on a paper discharge bowl; the paper discharging means has a paper discharging roller, composed of paper discharging upper and lower rollers 21 and 22 for nipping, carrying, and discharging the paper sheet and rotatable normally and inversely, a crimping means 23 for oscillating the roller 21 to pressedly contact with and separate from the roller 22, and a driving means having the drive source of a single drive motor M1 for driving the rollers 21 and 22 and the means 23 and rotatable in normally and inversely.