PROBLEM TO BE SOLVED: To quickly attach an electrode device for an electrocardiograph while accurately positioning an electrode without imposing an excessive burden on a person to be measured. SOLUTION: A plurality of electrodes 10a, 10b, 10c for the chest are arranged in the longitudinal direction on the inner surface of an electrode holder 50 made of a belt-shaped member, and the electrodes 10a, 10b, 10c are in contact with the skin at the measurement position. An electrocardiograph electrode device 1A that is laterally mounted on the chest of a subject to perform measurement, and locking bodies 51a and 51b having a predetermined shape are attached to both ends of the belt-shaped member. , The locking bodies 51a and 51b are sandwiched between the back and the floor surface while applying tension to the belt-shaped member through both axils of the person to be measured lying on their backs, thereby forming on the contact surface of the locking bodies 51a and 51b. It is characterized in that the electrode holder 50 is attached to the person to be measured while being fixed by frictional force. [Selection diagram] Fig. 1【課題】心電計用電極装置について、被測定者に過大な負担をかけることなく電極を正確に位置決めしながら迅速に装着できるようにする。【解決手段】胸部用の電極１０ａ，１０ｂ，１０ｃがベルト状部材からなる電極ホルダ５０の内側面で長手方向に複数個配置され、各電極１０ａ，１０ｂ，１０ｃが測定位置の皮膚に接するように被測定者の胸部に横向きに装着されて測定を行う心電計用電極装置１Ａであって、そのベルト状部材の両端側には、所定形状の係止体５１ａ，５１ｂが各々付設されており、その係止体５１ａ，５１ｂを仰臥した被測定者の両腋下を通してベルト状部材に張力をかけながら背中と床面の間に各々挟み込むことにより、係止体５１ａ，５１ｂの密着面に生じる摩擦力で電極ホルダ５０を固定しながら被測定者に装着される、ことを特徴とするものとした。【選択図】図１
