Patent ID: 7267338

Claim:
An image processing apparatus comprising: a sheet supply unit which supplies a sheet; an image processing unit which performs image processing to the sheet supplied by the sheet supply unit; a sheet guide which forms a sheet path through which the sheet on which the image processing is performed by the image processing unit passes through; a sheet ejection unit which ejects the sheet guided by the sheet guide, the sheet ejection unit ejecting the sheet to an ejection tray or a post-processing device for performing post-processing to the sheet, one of the ejection tray and the post-processing device being selectively attached to an apparatus main body; a support unit which slidably supports the ejection tray when the ejection tray is attached to the apparatus main body and the post-processing device when the post-processing device is attached to the apparatus main body, wherein the sheet guide moves so that the sheet path is opened and closed in conjunction with the slide movement of the ejection tray when the ejection tray is attached to the apparatus main body, and the sheet path is opened and closed in conjunction with the slide movement of the post-processing device when the post-processing device is attached to the apparatus main body; and, a double-sided conveying unit which conveys the sheet in which image processing has been performed by the image processing unit to the image processing unit again, wherein the double-sided feed unit is formed so as to be slidable in the same direction as a slide movement direction of the ejection tray or the post-processing device.