A toner cartridge, and a process unit and image forming apparatus using the same. Toner contained in an outer chamber is scooped with a toner scooping member by rotation of a toner container and slides down toward a communication port along an upper surface of a partition, and falls down to an inner chamber from the communication port. Then, the toner that has fallen down into the inner chamber from the communication port slides down toward a toner discharging port along the inner surface of the partition, and is discharged from the toner discharging port. Furthermore, toner discharged form the toner discharging port is discharged from a toner through hole provided in a toner container supporting member to the outside of the toner cartridge.