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 (13A, 13B) configured to vibrate the film; wherein the driver is configured to apply a driving signal to the vibration generators (13A, 13B), 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 (13A, 13B) 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 (13A, 13B) 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 (13A, 13B) 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 (13A, 13B) configured to vibrate the film; wherein the driver is configured to apply a driving signal to the vibration generators (13A, 13B), 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 (13A, 13B) 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 (13A, 13B) 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 (13A, 13B) 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 (13A, 13B) configured to vibrate the film; wherein the driver is configured to apply a driving signal to the vibration generators (13A, 13B), 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 (13A, 13B) 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 (13A, 13B) 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 (13A, 13B) at appropriate timings in order to change a direction of displacement of the film.