This device is a special stethoscope for AnesthesioIogists and is modified from a weighted Wanger stethoscope which consist of an earpiece, a connecting intravenous tube and a metal pickup head-of a stethoscope weighing 75 gm for specific purposes. It can be easily assembled in Korea using available standard equipment except for the plastic earpiece which needs to be adapted to each : individual Even through the cost is less than 1, 000 Won far all the elements needed, many advantages and accurate medical information can be obtained by this uncomplicated and inexpensive device when used to full capacity from induction to recovery. The purpose of this report is to encourage anesthetists to use this simple device for complete patient care. The use of this equipment, the positioning of the chest piece and obtainable medical information is described here in.