In an image reading device of a multifunction device, a sheet transport device is provided with a resist roller and a resist roller in a sheet transport path extending from a document tray on which a document as a sheet is placed to an image reading region where reading of a document is performed. The resist roller and a roller correct skewing of the sheet and delivers the sheet to a transport path extending to the resist roller placed in front of the image reading region. After having been corrected once in the resist roller, the document is transported to the resist roller, so that it is possible to reliably correct skewing of the sheet with the resist roller and the roller.