To enable the convenient measurement of static pressure.

In the pressure sensor 100, a piezoelectric plate 10 is provided with a pair of rotors 13, and a measurement section 40 having a the piezoelectric plate 10 rotatably supported therein is provided between a reference pressure section 20 to which reference pressure is applied and a measurement pressure section 30 to which pressure as an measurement object is applied. The measurement section 40 is in communication with the reference pressure section 20 and the measurement pressure section 30, and the piezoelectric plate 10 is rotated about the rotors 13 as rotating shafts by means of a rotating means 50.