Sterilization device for stethoscope

A sterilizer for the stethoscope is provided, which can sterilize the stethoscope head by using the ultraviolet ray and maintains the temperature of the stethoscope head at the body temperature. A sterilizer for the stethoscope comprises: a cover(100) which is made of synthetic resin of the transparent material in order to easily observe the inside; a hole(110) formed so that the stethoscope waveguide can be drawn in the front side of the cover; a magnet(120) having the magnetic force in the front inner side; a case which is formed in the circular shape and consists of the waveguide and stethoscope head; a holder which is equipped so that the stethoscope head can be detachable; a sterilizer which is equipped inside the case; and a manipulation part which selectively controls the sterilization or the heating of the sterilizer.