To provide a space-saving, low-cost MFP that ensures high positional accuracy and image reproducibility.

An image forming apparatus is provided with: a paper ejection tray disposed at the top of its main body; a document transport path which joins a sheet material transport path located on the downstream side of a fixing position; a transport means located on the downstream side of the joining point; and an image sensor which is disposed on the downstream side of the transport means and reads the images of the document M and the sheet material P.