An image forming apparatus includes a sheet bundle housing unit that houses recording sheets piled as a sheet bundle; a swing member having a sheet contact portion on one end side, and swinging between a projection position at which the sheet contact portion projects above a sheet placement surface of the housing unit and a non-projection position at which the sheet contact portion does not project above the sheet placement surface, the swing member moving from the projection position to the non-projection position by the sheet bundle; a sheet detection unit that detects the sheet bundle in the housing unit using the swing member; and an interlocking mechanism that moves the swing member to the non-projection position, regardless of presence or absence of the sheet bundle in the housing unit, by interlocking with the housing unit being pulled out from an apparatus body.