A second opening and closing door has a main body of the second opening
and closing door, a sound absorbing member and a sound absorbing member
cover. The sound absorbing member covers almost the entire surface of the
main body of the second opening and closing door facing a guide member.
The sound absorbing member cover is dyed black and made of an
antistatic-treated cloth material which has air permeability, and is
designed to cover almost the entire surface of the sound absorbing member
facing the guide member. Further, the sound absorbing member cover is
dyed with a dye which does not contain carbon, so that carbon-containing
fibrous materials can be prevented from floating in an image forming
apparatus while the light-shielding effect can be maintained.