Abstract: A tube deformed by supply air is placed in a pulsation position of a mannequin. An air pump expanding and contracting by supply air is placed in a cardiac impulse position of the mannequin. An air bag is placed inside an abdomen or a chest of the mannequin. An air supplier is controlled by a computer.

Abstract: This invention is intended to provide an EKG recording electrode device which can be easily and quickly fitted to a patient without giving uncomfortable bodily sensations to the patient even if it is difficult to change the position of the patient, making it possible to properly take an electrocardiogram. An EKG recording electrode device comprises an electrode holder made of a sheet material having flexibility and a size suited for placing on an upper front part of a human body, and a plurality of electrodes attached to the electrode holder, each electrode including a contact portion having a curved surface on the side which comes into contact with a human skin.