The invention relates to the technical field of electrocardiogram displays and discloses an electrocardiogram display long in service life. The electrocardiogram display comprises an electrocardiogramdisplay body and is characterized in that the left end of the front side of the electrocardiogram display body is provided with a paper outlet, the front side of the electrocardiogram display body isprovided with a display screen, the front side of the electrocardiogram display body is provided with buttons, a waterproof film right above the display screen and the buttons is arranged on the upper surface of the electrocardiogram display body, the upper surface of the electrocardiogram display body is fixedly connected with one end, close to the front side, of the lower surface of a handle, and a radiating box is fixedly connected to one end, close to the back side, of the lower surface of the handle. The electrocardiogram display has the advantages that fans are arranged to cool the electrocardiogram display body, hot air is blown out through radiating holes, the electrocardiogram display body is good in radiating effect, and the service life of the electrocardiogram display is prolonged greatly.