This creation system provides a kind of stethoscope of improvement, its characteristic has further included a covering in what, is removably to cover on the outside of the earpiece of what stethoscope, to obstruct contacting for the earpiece and skin, comprising a sheet body and one of what sheet body first connecting portion is set, which can connect earpiece； Thereby, which can avoid generating uncomfortable ice-cold sense when earpiece contact skin, and can be replaced at any time, to prevent the contagion of bacterium, virus, it is ensured that the health of auscultation process.本創作係提供一種改良之聽診器，其特徵在於更包含有一遮蔽件，係可拆卸地覆蓋於聽診器之聽筒外側，用以阻隔該聽筒與皮膚之接觸，包含一片體與設於片體之一第一連接部，該第一連接部係可連接聽筒；藉此，該遮蔽件可避免聽筒接觸皮膚時產生不舒服之冰冷感，並可隨時予以更換，以杜絕細菌、病毒之接觸傳染，確保聽診過程之衛生。
