Electrophotographic image forming apparatus

An electrophotographic image forming apparatus that forms an image on a recording medium in a state in which a cartridge is detachably mounted to an apparatus main body of the electrophotographic image forming apparatus, comprising:

• a cartridge supporting member, which is movable between an inside position located inside the apparatus main body and an outside position located outside the apparatus main body, in a state of supporting the cartridges;
• a light emitting member having a plurality of light emitting elements provided side-by-side in a longitudinal direction of an electrophotographic photosensitive drum in a state in which the cartridge supporting member supporting the cartridge locates at the inside position to emit light for exposing the electrophotographic photosensitive drum in accordance with image information;
• a light emitting member support that supports the light emitting member so that the light emitting member can assume between an exposure position at which the plurality of light emitting elements emit light to expose the electrophotographic photosensitive drum and a retracted position retracted from the exposure position;
• and
• interlocking means that moves the light emitting member support from the exposure position to the retracted position in association with a movement of the cartridge supporting member toward the outside position, and moves the light emitting member support from the retracted position to the exposure position in association with a movement of the cartridge supporting member toward the inside position.