The utility model relates to an automatic original manuscript conveyor and image forming device, wherein, automatic original manuscript conveyor possesses: the base is connected with the image forming device main part, go up the casing, rotatably install on the base, the original manuscript is carried to rollgang, centre gripping ground, installs including the multiunit the base with the internal constitution transfer passage's of epitheca conveying roller, sound -insulating structure sets up the base with the sound of from this locating the leakage is absorbed through the mode that stops in the junction of going up the casing. The utility model discloses can realize low -cost silence effect when not to promote the cost greatly.