The present invention provides a sheet feeding apparatus and an image forming apparatus, in which excellent mounting ability is achieved and damage and dislodging of a recording apparatus can be prevented. A mounting opening for mounting the recording apparatus is formed in a side surface of an apparatus body comprised of an ASF upper case and an ASF base. When the recording apparatus is mounted, after the recording apparatus is rested on a recording apparatus supporting portions for supporting the recording apparatus for shifting movement in a mounting direction, the recording apparatus is guided along the recording apparatus supporting portions in the mounting direction. By providing an eaves portion substantially in parallel with the recording apparatus supporting portions, an upward movement of the recording apparatus is regulated when and after the recording apparatus is mounted.