The image forming apparatus includes: an ejection head which ejects ink having electrorheological properties toward a recording medium; an electric field application device which applies an electric field to droplets of the ink deposited on a surface of the recording medium; an electric field intensity control device which controls intensity of the electric field in such a manner that the ink in the droplets has a prescribed viscosity; and a fixing promotion device which carries out processing for promoting fixing of the ink on the recording medium, in a state where the electric field is applied by the electric field application device.