An object of the invention is to provide an inertial sensor with small delay and high accuracy. An inertial sensor 1 includes an acceleration detecting element 2 that detects an acceleration of at least one axis of a vehicle; a first filter 6 that limits a detection signal of the acceleration to a first band; a second filter 7 that limits a detection signal of the acceleration to a second band; a vehicle control variable calculation section 8 that calculates a vehicle control variable Gxc on the basis of the detection signal of the acceleration limited to the second band; and a sensor signal output section 9 that outputs the detection signal of the acceleration limited to the first band and the vehicle control variable.
