A method of manufacturing a toner includes preparing a droplet forming device, comprising a storage portion to store a toner composition solution, a thin film formed from a rigid material, bonded to the storage portion by a bonding material, and provided with a nozzle and an oscillation device including an oscillation generation device configured to generate an oscillation upon the thin film and an oscillation amplification device which has an oscillation surface including a position that is parallel and opposite to the thin film and is configured to amplify the oscillation, periodically forming a droplet of the toner composition solution including at least a resin and a coloring agent to be supplied between the thin film and the oscillation surface and discharging the droplet via the nozzle, and solidifying the droplet of the toner composition solution discharged via the nozzle, and forming a toner particle.