Image forming apparatus with enhanced cooling performance

An image forming apparatus comprising:

• a body;
• a plurality of image forming units;
• a plurality of stations in which the plurality of image forming units are configured to be detachably attached;
• a plurality of air supply ports to allow air supply to the plurality of stations;
• an air supply duct to cause air taken in from outside of the body of the image forming apparatus to flow toward the plurality of air supply ports;
• a full-specification inner cover configured to be installed in the body of the image forming apparatus when image formation is performed in a full specification state in which all of the plurality of image forming units are installed in the plurality of stations, the full-specification inner cover allowing air supply from all of the plurality of air supply ports to all of the plurality of stations and allowing attachment and detachment of the plurality of image forming units to and from the plurality of stations, and
• a specified-specification inner cover configured to be installed in the body of the image forming apparatus when image formation is performed in a specified specification state in which a station to be used, in which an image forming unit is installed, and an unused station, in which no image forming unit is installed, are present among the plurality of stations, the specified-specification inner cover allowing air supply from an air supply port corresponding to the station to be used, among the plurality of air supply ports, to the station to be used, preventing air supply to the unused station via an air supply port other than the air supply port corresponding to the station to be used, and allowing attachment and detachment of only the image forming unit to and from the station to be used.