Electrophotographic image forming apparatus

An electrophotographic image forming apparatus for forming an image on a recording material, comprising:

• a cartridge for storing developer;
• an intermediary transfer member, opposed to an eletrophotographic photosensitive drum, said electrophotographic photosensitive drum transferring a developed image formed on said electrophoto graphic drum onto said intermediate transfer member;
• a transfer member for transferring a developed image borne on said intermediary transfer member onto the recording material;
• a supporting member movable, while supporting a cartridge, between an image forming position for effecting image formation and a mounting and demounting position, away from the image forming position, for mounting and demounting said cartridge to said mounting portion;
• a residual developer container, mounted to said supporting member and provided with a cleaning member for removing developer remaining on a surface of said intermediary transfer member, for accommodating the developer removed by said cleaning member;
• wherein said residual developer container is detachably mountable relative to said supporting member when said supporting member is in the mounting and demounting position, and
• wherein said residual developer container is disposed such that in a state that said supporting member is in the image forming position, said cleaning member acts on the surface of said intermediary transfer member at a position downstream of said transfer member and upstream of said electrophotographic photosensitive drum with respect to a movement direction of said intermediary transfer member.