There is provided a toner cartridge capable of suppressing the use of the toner cartridge beyond its lifetime due to excessive refilling of toner, the toner cartridge including a housing 2 which forms an internal space for housing toner to be fed to an image forming apparatus and which has a filling port 6 for filling the internal space with the toner, a divider plate 4 which is pivotably supported in a swingable manner inside the housing 2 and which can divide the internal space when being hung down by gravity, and a fixing means which can fit the divider plate 4 in between an engaging projection 9 and a stopper 10 by screw-feeding the lower end of the divider plate 4 by a feed screw 3 for feeding toner and which can fix the divider plate 4 in the state of dividing the internal space.