The image forming apparatus comprises: a first liquid ejection device which ejects droplets of a first liquid; a second liquid ejection device which ejects droplets of a second liquid; and a liquid volume ratio control device which controls a liquid volume ratio of the first liquid and the second liquid ejected from the first liquid ejection device and the second liquid ejection device, according to an image formed on a recording medium by the droplets of the first liquid and the second liquid on the recording medium.