Image forming apparatus

An image forming apparatus comprising:

• an image forming unit configured to transfer a toner image formed on an image bearing member onto a recording medium;
• a stacking unit on which a recording medium to be conveyed to the image forming unit is stacked;
• and
• a first frame member and a second frame member which are aligned in a direction of a rotation axis of the image bearing member and face each other across the image forming unit and the stacking unit,
• wherein the first frame member includes a first side surface facing the image forming unit and a second side surface being provided separately from the first side surface and facing the stacking unit, and the second side surface being fixed to the first side surface, and
• wherein the second frame member includes an integrally-formed surface, the integrally-formed surface being a reference surface provided commonly for the image forming unit and the stacking unit.