Image forming apparatus

An image forming apparatus comprising:

• an image forming unit configured to perform image formation on a sheet, the image forming unit comprising a process unit;
• a frame configured to hold the process unit detachably attached thereto, the frame comprising:
• a first communication portion configured to communicate with an outside of the image forming apparatus in a first direction in which the image forming unit is allowed to be detached from the frame through the first communication portion;
• and
• a second communication portion configured to communicate with the outside of the image forming apparatus in a second direction different from the first direction;
• a voltage output terminal provided to the frame and configured to apply therethrough a voltage to one or more voltage loads including the image forming unit;
• and
• a material holder configured to hold material for the image formation by image forming unit and detachably attached to a predetermined portion of the frame that is close to the second communication portion relative to the voltage output terminal, so as to close the second communication portion and prevent an external access to the voltage output terminal through the second communication portion, the material holder comprising at least one of:
• a developer holder configured to hold development agent for the image formation;
• a sheet holder configured to hold the sheet to be fed to the image forming unit;
• and
• an image fixing unit configured to hold the sheet being conveyed therethrough and fix an image formed on the sheet by the image forming unit.