A developing cartridge is disposed in an image forming apparatus. The developing cartridge includes a developing portion; a toner storing portion; a partition wall positioned between the developing portion and the toner storing portion and provided with a toner supply section; a first agitating member inside the developing portion; and a second agitating member inside the toner storing portion, wherein at least one of the first agitating member and the second agitating member comprises an elastic member to be in contact with the partition wall.