To provide a structure which allows a development roller to be moved in a direction of separating from a photoreceptor drum according to a component provided on a development cartridge.SOLUTION: A development cartridge 1 includes: a development roller; a casing 10; and a lever 60. The lever 60 can be rotated between a first position and a second position, with regard to a second shaft extending in a first direction, relative to the casing 10. When the lever 60 rotates from the first position to the second position, in a state that the development cartridge 1 is fitted to a drum cartridge, the lever 60 contacts a part of the drum cartridge 2. Further, the development cartridge 1 moves relative to the drum cartridge 2 by using a contact point where the lever 60 and the drum cartridge 2 were in contact, as a fulcrum. Accordingly, the development roller can be moved in a direction of separating from a photoreceptor drum 92.SELECTED DRAWING: Figure 5