An image forming apparatus including a rotatable developer container; a receiving device which receives the container which is inserted in a direction along a rotational axis of the container and which receives the developer discharged from the container when the container is in a first position; and a regulating member provided on the container, the regulating member being effective to prevent, during transportation of the image forming apparatus, the container from moving to the first position from a second position which is upstream of the first position with respect to an inserting direction of the container and in which the developer is not discharged from the container.