A droplet forming device comprising: a droplet discharger ; and a driver , wherein the droplet discharger comprises: a liquid holder configured to hold a liquid ; a film having a discharge hole ; and two or more vibration generators configured to vibrate the film ; wherein the driver is configured to apply a driving signal to the vibration generators , wherein one of the two or more of the vibration generators (13A; 13B) are disposed in each region on the film where a polarity of bending moment differs, i.e. in each region on a plus side and a minus side of the film with respect to a bending moment polarity conversion line interposed therebetween, wherein the two or more vibration generators are disposed on the film spaced outward by a certain distance from a center of the discharge hole , wherein the two or more vibration generators are disposed on the film in an annular shape or in a frame-like shape with respect to the center of the discharge hole , wherein the driver is configured to individually drive each vibration generator at appropriate timings in order to change a direction of displacement of the film . a droplet discharger ; and a driver , wherein the droplet discharger comprises: a liquid holder configured to hold a liquid ; a film having a discharge hole ; and two or more vibration generators configured to vibrate the film ; wherein the driver is configured to apply a driving signal to the vibration generators , wherein one of the two or more of the vibration generators (13A; 13B) are disposed in each region on the film where a polarity of bending moment differs, i.e. in each region on a plus side and a minus side of the film with respect to a bending moment polarity conversion line interposed therebetween, wherein the two or more vibration generators are disposed on the film spaced outward by a certain distance from a center of the discharge hole , wherein the two or more vibration generators are disposed on the film in an annular shape or in a frame-like shape with respect to the center of the discharge hole , wherein the driver is configured to individually drive each vibration generator at appropriate timings in order to change a direction of displacement of the film . a liquid holder configured to hold a liquid ; a film having a discharge hole ; and two or more vibration generators configured to vibrate the film ; wherein the driver is configured to apply a driving signal to the vibration generators , wherein one of the two or more of the vibration generators (13A; 13B) are disposed in each region on the film where a polarity of bending moment differs, i.e. in each region on a plus side and a minus side of the film with respect to a bending moment polarity conversion line interposed therebetween, wherein the two or more vibration generators are disposed on the film spaced outward by a certain distance from a center of the discharge hole , wherein the two or more vibration generators are disposed on the film in an annular shape or in a frame-like shape with respect to the center of the discharge hole , wherein the driver is configured to individually drive each vibration generator at appropriate timings in order to change a direction of displacement of the film . <EOS>