Toner cartridge and image forming apparatus

A toner cartridge comprising:

• a cartridge body in a box shape;
• a toner transport screw disposed in the cartridge body;
• a toner stirrer disposed in the cartridge body and extending substantially parallel to the toner transport screw, the toner stirrer being configured to rotate and stir toner in the cartridge body, the stirred toner to be transported by the toner transport screw to an outlet through which the toner is discharged from the cartridge body;
• and
• a partition between the toner transport screw and the toner stirrer, wherein
• the toner stirrer at a default position is in contact with a top of the partition and covers the toner transport screw from above to define a closed space around the toner transport screw, the closed space being separate from a remaining space having the toner, and
• the closed space is in communication with the remaining space when the toner stirrer rotates from the default position to be away from above the toner transport screw, enabling the toner to move toward the toner transport screw.