An image forming apparatus, including: an apparatus main body; an openable and closable member provided on the apparatus main body; an image reading portion configured to read an image of an original, the image reading portion being supported on the apparatus main body and being movable to a first position and to a second position; and a stopper member configured to move in conjunction with a movement of the image reading portion, wherein when the image reading portion is moved to the first position, the stopper member is moved to a restricting position for restricting the openable and closable member from moving from a closed position to an open position, and wherein when the image reading portion is moved to the second position, the stopper member is moved to an allowing position for allowing the openable and closable member to move from the closed position to the open position.