Patent ID: 8774896

Claim:
An electrocardiograph comprising: a first induction electrode inducting a first signal applied thereto; a second induction electrode inducting a second signal applied thereto; a first reference electrode associated with the first induction electrode as an indifferent electrode; a second reference electrode associated with the second induction electrode as an indifferent electrode; a signal difference generation section generating a potential difference between a signal outputted from the first induction electrode and a signal outputted from the second induction electrode as a signal difference; an electrocardiographic detection section detecting an electrocardiographic complex of a subject based on the signal difference generated by the signal difference generation section; a signal applying section applying the first signal to the first induction electrode and the second signal to the second induction electrode, the first signal having a property different from the electrocardiographic complex, the second signal having a property different from the electrocardiographic complex and the first signal; and a contact detection section detecting a contact state of the subject to the first induction electrode and the second induction electrode based on the signal difference generated by the signal difference generation section.