PURPOSE: To perform sure sheet pile position adjustment over a large paper size adjustment range by making the length of a pushrod changeable in a jogging device provided with the pushrod provided with a thrust plate on an end part turned to a sheet pile direction.

CONSTITUTION: This sheet pile jogging device provided in the paper discharge device of a sheet paper offset printer is provided with a holding device 40 fixed to a rack (pushrod) 14 arranged on a side wall 5 movable in the sheet pile direction and paper sheets stacked on a discharged paper sheet pile are position adjusted to a side part by the thrust plate 4 pivotally attached to the holding device 40. The rack 15 is housed inside a hollow shaft 14 fitted inside the hollow shaft 7 movably and non-turnably supported inside a supporting bush 6 fixed to the side wall 5. Inside the supporting block 23, an adjustment shaft 25 rotated by a handle shaft is supported on the lower side of the rack 15 and a gear 24 fixed to the adjustment shaft 25 is engaged with the rack 15.