Acoustic emission has been studied for a wide range of polymers induding amorphous-glasses，semi-ciystalline polymers，copolymers，polymer blends and a crosslinked rubber du-ring the course of uni．axial stretching at room temperature．For noncrystalline polymers acoustic emission occurred in rather small number of events accompanied by crazing and micro-crack formation．Strong acoustic activity appeared during yidding and necking of cry-stalline polymers．Rather small number or none of acoustic bursts occurred during the initial stage of neck drawing but numerous strong bursts appeared when drawing proceeded appro-aching specimen break．Specimens of the same polymer but of different fabrication history may be reflected in their acoustic emission behavior．Acoustic emission during stretching crosslinked poIybutadiene rubber was very weak but observable when the force-dongation curve started to deviate from the linear region．No Kaiser effect was observed for the rub-bet．Very strong and numerous acoustic emission was observed during stretching specimens of polymer blends．High impact resistant polymer modifications showed no sharp increase-of acoustic activity before specimen break．So long aS the polymer and conditions of sped-men fabrication are the same quite reprodudble acoustic emission behavior could be obser-ved．