of an eraser 10 formed by a plurality of lamps arranged axially in multiple stages such as an led array electric charge of an image nonforming portion of the photosensitive drum 1 is erased subsequently at a developing region x or x 39 of the photosensitive drum 1 which confronts a developing sleeve 12 provided in each of the first and second developing devices 4 and 5 the electrostatic latent image is supplied with toner so as to be developed into a visible toner image which reproduces the image of the original document a copy paper sheet is selectively supplied from a paper feeding section 50 or 51 provided at a lower left portion of the apparatus housing h and is transported by two engaged timing rollers 52 to a portion transfer region y of the photosensitive drum 1 which portion confronts the transfer charger 6 synchronously with the toner image formed on the photosensitive drum 1 after the toner image has been transferred onto the copy paper sheet at the transfer region y the copy paper sheet is transported by a transport belt 56 in between a pair of fixing rollers 53 where the toner image of the copy paper sheet is fixed on.