Electrocardiogram data detection device

An electrocardiogram data detection device installed on a vehicle seat having a seat bottom and a seat back, the electrocardiogram data detection device comprising:

• a plurality of electrodes provided in the seat back so as to face a body of a person sitting on the vehicle seat, each electrode outputting a measurement signal;
• a differential signal generation unit configured to generate a differential signal between a pair of measurement signals from a corresponding pair the of electrodes, so as to generate a plurality of differential signals by selecting a plurality of pairs from among the plurality of electrodes;
• and
• an electrocardiogram data detection unit configured to obtain electrocardiogram data based on the plurality of differential signals,
• wherein the plurality of electrodes include:
• at least three first electrodes disposed along a width direction of the seat back in a first region of the seat back;
• and
• at least one second electrode disposed in a second region of the seat back, the first region being closer to the bottom seat than the second region which is located above the first region, and
• wherein the plurality of differential signals includes at least six differential signals obtained from the measurement signals of the at least three first electrodes and the measurement signal of at least one second electrode.