To provide an image forming device capable of dividing a delivered recording paper on which copying is performed for a series of document images and handling it by stapling.

This image forming device is provided with an image forming part for copying document image on a paper by a predetermined image forming process, a delivery handling part for delivering the recording paper on which image is formed in the image forming part, a post-handling part for handling and stapling a bundle of recording papers delivered by the delivery handling part, and a post-handling mode setting means for setting whether staple handling by the post-handling part is possible or not. The post-handling mode setting means is provided with a staple handling number setting means for setting the number of recording papers handled by stapling for a series of document images when operation mode is staple handling mode.