An image forming apparatus includes: a housing; a drawer; and first and second process cartridges attachable to the drawer. The first process cartridge includes a first drum cartridge including a first photosensitive drum and a first developing cartridge including a first developing roller. When attached to the first drum cartridge, the first developing cartridge is movable between a first position where the first developing cartridge is detachable from the first drum cartridge and a second position where the first developing cartridge is not detachable from the first drum cartridge. In a state where the first and second process cartridges are attached to the drawer at positions adjacent to each other, the first developing cartridge comes into contact with the second process cartridge during movement of the first developing cartridge from the second position to the first position before the first developing cartridge reaches the first position.

A developing cartridge including a casing, a developing roller, a developing roller gear, a gear cover, a first boss, and a pressure receiving surface. The developing roller is positioned closer to a first end portion of the casing than to a second end portion of the casing in a first direction. The first boss extends in a second direction and is movable together with the casing. The first boss is positioned away from the developing roller in the first direction by a first distance and also positioned away from the developing roller in a third direction. The pressure receiving surface is positioned further from the developing roller than the first boss is from the developing roller in the third direction. The pressure receiving surface is positioned away from the developing roller by the first distance or by a second distance shorter than the first distance.

A first cartridge support is configured to support a drum cartridge. The first cartridge support is configured to move in a first direction between a first position at which the drum cartridge is mounted on a housing and a second position at which the drum cartridge is detachable. A second cartridge support is configured to support a development cartridge. The second cartridge support is configured to move in the first direction between a third position at which the development cartridge is mounted on the drum cartridge and a fourth position at which the development cartridge is detachable. In a state where the second cartridge support is located at the third position, the second cartridge support is located between the first cartridge support located at the first position and a cover located at a closed position with respect to the first direction.

An image forming apparatus has a body frame and a slide frame. The slide frame is configured to be pulled out from the body frame along a sliding direction. A plurality of image forming cartridges is detachably mounted on the slide frame. A plurality of electrode members is mounted on the slide frame and aligned along the sliding direction so as to correspond to the image forming cartridges. A body-side contact portion of each of the electrode members is electrically connected to the body frame. A cartridge-side contact portion of the electrode member is electrically connected to the image forming cartridge. The image forming cartridge is connected to the body via the corresponding electrode member when the slide frame mounting the image forming cartridges is inserted to the body frame.

An image forming apparatus includes process units and developer cartridges; a process unit supporting member; a cartridge supporting member; and a moving mechanism. Each developer cartridge includes a transporting member configured to transport developer to a corresponding process unit. The moving mechanism is configured to move each transporting member between a communicated position, in which developer is transported to the corresponding process unit, and an interrupted position, in which transporting of developer to the corresponding process unit is interrupted. The transporting member positioned in the interrupted position allows the cartridge supporting member to move from an attached position to a withdrawn position and allows the process unit supporting member to be withdrawn, and the transporting member positioned in the communicated position prevents the cartridge supporting member from moving from the attached position to the withdrawn position and prevents the process unit supporting member from being withdrawn.

A developing roller is located nearer a first end than a second end in a first direction. A first boss extends in a second direction and is movable together with a housing. The first boss bears the weight of a developer cartridge when the first boss is supported by a support surface of a first side plate of a drum unit, and is located away from the developing roller in the first direction and the third direction. A first pressure receiving surface is located farther away from the developing roller than the first boss in the third direction. The pressure receiving member receives a pressing force in the third direction from a pressing member of the first side plate of the drum unit. The first boss is located away from the developing roller in the first direction by a first distance. The first pressure receiving surface is located away from the developing roller in the first direction by the first distance or by a second distance smaller than the first distance.

A developing cartridge includes a casing and a developing roller. The casing has an accommodation chamber, first and second ribs, a handle, and first and second pressure members. The accommodation chamber has one end portion and another end portion in a first direction, and an outer surface. The developing roller is positioned at one side of the accommodation chamber in a second direction. The ribs, the handle, and the pressure members are positioned at another side of the accommodation chamber in the second direction. The ribs and the pressure members are positioned at the outer surface. The handle is positioned between the first rib and the second rib in the first direction. The first pressure member is positioned between the handle and the first rib in the first direction. The second pressure member is positioned between the handle and the second rib in the first direction.

An image forming apparatus includes a cartridge including a rotatable photosensitive drum or a rotatable developing sleeve; and a supporting member for detachably supporting the cartridge, the supporting member and being movable between an inside position for permitting mounting of the cartridge to the apparatus and an outside position in direction along an axial direction of the drum or the sleeve. The cartridge is mountable to the supporting member from above. When the supporting member is in the outside position with the cartridge mounted thereon, an upstream end of the supporting member with respect to a moving direction from the inside position toward the outside position is inside the forming apparatus. When the supporting member is in the outside position, a downstream portion thereof is lower than that when the supporting member is in the inside position.

An image forming apparatus includes a main body casing; a first drum unit including a first photosensitive drum configured to rotate about an axis extending in a first direction; a second drum unit including a second photosensitive drum configured to rotate about an axis extending in the first direction; a belt; a cleaning member configured to clean the belt; an auger configured to convey waste toner cleaned by the cleaning member; a first toner cartridge including a first new toner containing unit configured to supply new toner and a waste toner containing unit configured to contain the waste toner conveyed by the auger; and a second toner cartridge including a second new toner containing unit configured to supply new toner to the second drum unit. The waste toner containing unit is aligned with the first new toner containing unit in a second direction perpendicular to the first direction.

An image forming apparatus includes a body casing, a pressing member, a process cartridge, and a drawer. The body casing includes a positioning member. The pressing member is disposed inside the body casing. The process cartridge includes a photosensitive drum. The drawer is configured to support the process cartridge and to move, in a sliding direction orthogonal to an axis direction of the photosensitive drum, between an inside position that is a position inside the body casing and an outside position that is a position outside the body casing. The process cartridge includes an engagement portion and a spring. The engagement portion is configured to be positioned by the positioning member. The spring is configured to be pressed by the pressing member such that the engagement portion is pressed toward the positioning member.