A respiration signal of a seated person is detected with high accuracy. A vehicle seat includes a seat cushion (102) and a sensor (20) detecting a pressure signal from a load applied from a seated person (80). The sensor (20) is provided so as to be along an edge of a contact portion between the seat cushion (102) and buttocks of the seated person (80). The sensor (20) transmits the detected pressure signal to an arithmetic operation device of the seated person (80). In a respiration measuring device, the arithmetic operation device computes the detected pressure signal detected by the sensor (20) to obtain a respiration signal of the seated person (80) .
