Method and apparatus for forming image

For the purpose of obtaining minute particles having a uniform diameter and uniformly charged, an image forming apparatus of the invention comprises a supplying member (22) for supplying charged developing particles, a counter electrode (6) disposed opposite to the supplying member (22), and a control electrode (9) disposed between the supplying member (22) and the counter electrode (6) and having a plurality of passing holes (13) serving as passages for the developing particles, in which image forming apparatus, while a potential for generating a predetermined potential difference is applied between the supplying member (22) and the counter electrode (6), a potential which is to be applied to the control electrode (9) is changed, in order to change an electric field existing between the supplying member and the counter electrode (6), to thereby control flying of the developing particles passing through the passing holes (13) in a direction from the supplying member to the counter electrode (6), thereby forming an image, wherein the developing particles are formed of a liquid or the iquescent material, and fine-grained and charged with electricity by the supplying member (22).