Patent ID: 7519321

Claim:
An image forming apparatus in which an original reading portion is disposed in an upper portion of an apparatus main body, a feed portion is disposed in a lower portion of the apparatus main body, and a print portion is disposed between the original reading portion and the feed portion, comprising: a control portion, a paper post-processing portion that performs paper post-processing for paper transported from the apparatus main body after printing by the print portion is finished, disposed in a space of the apparatus main body formed by the original reading portion, the print portion, and the feed portion, a drive roller provided in a discharge roller portion that discharges paper from the paper post-processing portion to a discharge portion, and at least two idler rollers provided in the discharge roller portion that form a pair with the drive roller and can be selectively used when discharging paper to the discharge portion, wherein the idler roller to be used for paper discharge is selected by the control portion according to the presence or absence of staple processing in the paper post processing portion.