To make it possible to stably measure heartbeats even if seated persons physically differ and to measure the heartbeats of even a seated person other than a driver. A vehicle seat includes: a measuring device including a plurality of sensors that are provided in a seat back and that acquire body potentials of the seated person, and an arithmetic operation device that computes electrical signals to obtain an electrocardiographic signal of the seated person. The sensors are each capacitively coupled sensors. The sensor is arranged at a lower right position relative to the sensor and the sensor while facing a front surface of the seat back if a surface of the seat back facing the seated person is assumed as the front surface. Both sensors are arranged so that the seated persons heart is located in a zone if the zone is defined from the sensor and the sensor.
