A toner supply container, detachably mountable to a main assembly of an image forming apparatus, for supplying toner to the main assembly of the image forming apparatus, the toner supply container includes a main body for accommodating the toner; a discharging opening for permitting discharging of the toner accommodated in the main body of the container; a container shutter member for opening and closing the discharging opening; a rotatable member rotatably supported by the main body of the container and having a drive transmitting portion for engaging with a rotational force transmitting means provided in the main assembly of the apparatus to transmit the rotational force to the rotational force transmitting means; a rotating force receiving portion for receiving the rotating force from the rotating force transmitting means through engagement with the rotating force transmitting means, wherein the container shutter member is given a force for opening and closing the discharge opening by the rotating force received by the rotating force receiving portion.