A processing apparatus, including an image carrier which carries a developing-material
image formed by developing an electrostatic latent image with a developing material,
a transferring device which transfers the developing-material image from the image
carrier to a transfer object, and a cover member which at least partly covers the
transferring device. The cover member has one or more air-flow holes which allow
an air to flow therethrough between an inner side thereof opposed to the transferring
device and an outer side thereof opposite to the inner side.