Lubricant replacement case

A lubricant replacement case for an image forming apparatus, the lubricant replacement case comprising:

• a housing including a plurality of storage compartments to accommodate at least one lubricant unit, wherein the plurality of storage compartments include at least one storage compartment for unused lubricant to be inserted into the image forming apparatus and at least one storage compartment for used lubricant to be retrieved from the image forming apparatus,
• wherein the housing includes a guiding support forming the plurality of storage compartments and an end forming an opening to slide a lubricant unit into one of the plurality of storage compartments in the longitudinal direction, wherein the housing includes an end cover forming the opening and an outer shell to cover the guiding support, wherein the outer shell forms a slit extending in the longitudinal direction at a position that is adjacent to the opening of the end cover.