In a remanufacturing method for remanufacturing a cartridge from a material cartridge, the material cartridge is attachable to and detachable from an apparatus main body of an image forming apparatus, and the apparatus main body includes a guide member. The material cartridge includes a frame member including an engagement portion configured to be engaged with the guide member, and a first attachment portion provided in the engagement portion, and a first storage member. The first storage member includes a first holding portion configured to hold a first electrode and be attached to the first attachment portion. The remanufacturing method includes detaching the first holding portion, attaching a second electrode to the frame member, and attaching a second storage element to the frame member at a different position from a position of the first attachment portion.