Image forming apparatus, exposure apparatus and image forming method

An exposure apparatus comprising:

• a supporting body;
• a substrate that is supported by the supporting body;
• a plurality of light emitting elements that are arranged on the substrate in a line;
• a heating unit that heats the substrate, the heating unit being configured so as to be detachable from the supporting body;
• and
• a holding member that receives an inflow of heat generated from the heating unit and integrally holds the heating unit, wherein
• the heating unit is attached to and detached from the supporting body integrally with the holding member.

An image forming method in an image forming apparatus, the image forming apparatus including:

• a plurality of image carriers;
• and
• a plurality of exposure apparatuses that are arranged corresponding to the plurality of image carriers respectively, the plurality of exposure apparatuses each having a light emitting element member that exposes the respective image carrier and is arranged on a substrate,
• wherein a predetermined exposure apparatus among the plurality of exposure apparatuses includes a heating unit that heats the substrate, and
• wherein another exposure apparatus among the plurality of exposure apparatuses does not include a heating unit,
• the image forming method comprising:
• heating the substrate of the predetermined exposure apparatus among the plurality of exposure apparatuses, and
• forming an image using the image forming apparatus.