To provide a driving device for smoothly operating a driving coil configuring an actuator.

In a step ST13, the cumulative value ΣT of operating speed constants is divided by a predetermined value S so that the ΣT/S can take a rational number or irrational number which is not a natural number. As a result, it is possible to acquire a moving speed which has not been acquired in a conventional manner. Also, it is possible to acquire a different moving speed by setting the predetermined value S or the moving speed constant T as a different value, and to more finely set the moving speed than a conventional manner.