The invention provides an image forming apparatus achieving a reduction in cost without a pickup roller, and preventing paper jam sheets from being damaged during the elimination of a paper jam. A sheet containing unit (105) containing and recording sheets (S) and a separating roller unit (120) containing a separating roller (121) in the side direction are disposed in a sheet tray (100), the separating roller (121) is hold in the sheet tray (100) and then is assembled and disassembled along with the sheet tray (100) relative to the apparatus body (50), and the sheet tray (100) is pulled out from the separating roller unit (120) in the side direction of the sheet containing unit (105) by lateral excursion.