The utility model discloses a stethoscope chest piece heating device and relates to a medical instrument. The stethoscope chest piece heating device comprises a direct-current power supply, a switch, a wireless emission circuit module, an emission coil, a receiving coil and a load resistor, wherein the direct-current power supply and the switch are in series connection with a direct-current power supply input port of the wireless emission circuit module, the emission coil is in parallel connection with an alternating-current output port of the wireless emission circuit module, the receiving coil and the load resistor are arranged in a chest piece and are in parallel connection with each other, and the outer diameters of the emission coil and the receiving coil correspond to the size of the inner chamber of the chest piece. The wireless emission circuit module converts electricity energy provided by the direct-current power supply into alternating-current signals and emits the alternating-current signals to the emission coil. Electromagnetic waves emitted by the emission coil are received by the receiving coil in the chest piece. The receiving coil and the load resistor emit heat in the chest piece to enable the temperature of the chest piece to be close to the body temperature of a patient, and therefore discomfort of the patient at checking time can be removed.