An image forming apparatus comprising: a main body that comprises a door capable of opening and closing; a process cartridge that is configured to be installed in the main body and includes a toner inlet ; and a toner cartridge that contains toner to be supplied to the process cartridge , and is attachable to and detachable from the main body through the door , wherein the toner cartridge comprises: a toner outlet connectable to the toner inlet ; an inner shutter having an opening and being configured to move to an open position in which the opening is in communication with the toner outlet and a closed position in which the toner outlet is closed, and an outer shutter that is configured to move to a first position, in which the toner is not allowed to be discharged, and a second position, in which the toner is allowed to be discharged through the opening , wherein the outer shutter moves to the second position when the toner cartridge is attached to the main body , characterized in that the image forming apparatus is configured such that the inner shutter moves from the closed position to the open position by being interlocked in a closing operation of the door after the toner cartridge is loaded into the main body , wherein the image forming apparatus further comprises a first elastic member to apply an elastic force to the outer shutter so that the outer shutter is located at the first position covering the inner shutter . a main body that comprises a door capable of opening and closing; a process cartridge that is configured to be installed in the main body and includes a toner inlet ; and a toner cartridge that contains toner to be supplied to the process cartridge , and is attachable to and detachable from the main body through the door , wherein the toner cartridge comprises: a toner outlet connectable to the toner inlet ; an inner shutter having an opening and being configured to move to an open position in which the opening is in communication with the toner outlet and a closed position in which the toner outlet is closed, and an outer shutter that is configured to move to a first position, in which the toner is not allowed to be discharged, and a second position, in which the toner is allowed to be discharged through the opening , wherein the outer shutter moves to the second position when the toner cartridge is attached to the main body , a toner outlet connectable to the toner inlet ; an inner shutter having an opening and being configured to move to an open position in which the opening is in communication with the toner outlet and a closed position in which the toner outlet is closed, and an outer shutter that is configured to move to a first position, in which the toner is not allowed to be discharged, and a second position, in which the toner is allowed to be discharged through the opening , wherein the outer shutter moves to the second position when the toner cartridge is attached to the main body , characterized in that the image forming apparatus is configured such that the inner shutter moves from the closed position to the open position by being interlocked in a closing operation of the door after the toner cartridge is loaded into the main body , wherein the image forming apparatus further comprises a first elastic member to apply an elastic force to the outer shutter so that the outer shutter is located at the first position covering the inner shutter . <EOS>