This invention relates to a myocardial pad used in cardioversion, pacing, or the like and to a myocardial lead and a therapeutic apparatus for cardiac disease comprising the same. The myocardial pad of this invention is bondable to epicardia and has conductivity, biocompatibility, and biodegradability. Using this pad, the myocardial lead can be immobilized onto the atrium without suture. Thus, bleeding from the atrium, which is a lethal complication, caused by lead removal can be prevented.