There is provided a driving device of a liquid drop ejecting head, includes: a piezoelectric element for causing expulsion of liquid drops from an ejector which ejects liquid drops, a first electrode of the piezoelectric element being connected to a predetermined voltage; a switching section connected to a second electrode of the piezoelectric element, and able to switch among three states which are a charging state of the piezoelectric element, a discharging state of the piezoelectric element, and an open state; and a control section controlling switching of the switching section in a cycle which is shorter than a charging time or a discharging time of the piezoelectric element by the switching section.