An acceleration sensor that achieves a simultaneous operation method of a signal detection and a servo control is provided as an alternative to a time-division processing method. The acceleration sensor is a MEMS capacitive acceleration sensor. The acceleration sensor includes signal detection capacitor pairs 12, 15, and DC servo control capacitor pairs 13, 16, and AC servo control capacitor pairs 14, 17, which are different from the signal detection capacitor pairs 12, 15. A voltage that generates a force in a direction opposite to a detection signal of acceleration detected by the signal detection capacitor pairs 12, 15 is applied to the DC servo control capacitor pairs 13, 16 and the AC servo control capacitor pairs 14, 17.