Image forming apparatus

An image forming apparatus, comprising:

• a main-body housing;
• a drum cartridge located inside the main-body housing;
• and
• a toner cartridge mountable in and demountable from the main-body housing,
• wherein the drum cartridge includes:
• a photosensitive drum rotatable about an axis extending in a first direction;
• a drum frame supporting the photosensitive drum rotatably, the drum frame including a first side plate supporting a first end of the photosensitive drum in the first direction and a second side plate supporting a second end of the photosensitive drum opposite to the first end in the first direction;
• a developer casing located between the first side plate and the second side plate in the first direction, the developer casing being configured to contain toner to be supplied to the photosensitive drum, the developer casing supporting a developing roller configured to supply the toner to the photosensitive drum, the developer casing being movable with respect to the photosensitive drum;
• a toner-inlet opening through which the toner to be supplied to the photosensitive drum is receivable from the toner cartridge;
• and
• a toner-supplying opening, through which the toner received through the toner-inlet opening is supplied to the developer casing,
• wherein the developer casing includes an inlet configured to receive the toner from the toner-supplying opening,
• wherein the drum cartridge includes a sealing member located between the toner-supplying opening and the inlet, the sealing member being elastically deformable according to the developer casing moving with respect to the photosensitive drum,
• wherein the toner cartridge includes a toner casing, the toner casing including a toner container configured to contain the toner to be supplied to the photosensitive drum and a toner-outlet opening through which the toner in the toner container is dischargeable into the toner-inlet opening of the drum cartridge,
• wherein the drum cartridge is mountable in and demountable from the main-body housing in the first direction in a state where the toner cartridge is demounted from the main-body housing, and
• wherein the toner cartridge is mountable in and demountable from the main-body housing by moving in the first direction with respect to the drum cartridge.