A method of applying fluid includes feeding fluid to between two faces disposed with a gap maintained therebetween and changing the gap between the two faces by driving of an actuator for intermittently discharging the fluid filled in between the two faces, wherein an input signal in which a high-frequency component and a DC component are superimposed is given to drive the actuator for changing the gap between two faces, so that the fluid filled in between the two faces is intermittently discharged for fluid application.