An electrocardiogram measuring device includes: chest measuring electrodes 113 that acquire electrocardiographic signals of a chest； a T-shirt 100 having an attachment holes of the chest measuring electrodes opened； a chair 200 on which limb measuring electrodes 212 and 214 that acquire electrocardiographic signals of limbs are arranged； and an electrocardiogram generating unit 310 that generates an electrocardiogram of a subject from the electrocardiographic signals of the chest and the limbs respectively acquired by the chest measuring electrodes attached to a body surface of the subject through the attachment holes of the T-shirt 100 and the limb measuring electrodes with which both hands and feet of the subject are brought into contact.
