To provide an image forming apparatus capable of realizing the reduction of cost and space for preventing the leak of high voltage by avoiding the use of an expensive high-voltage power source.

In the image forming apparatus where a toner image is transferred from a 1st image carrier to a 2nd image carrier being another image carrier by the application of voltage in a state where the 1st and the 2nd image carriers are held from both sides by electrodes by a means for transferring the toner image from the 1st image carrier to the 2nd image carrier by using electric field, voltage having a reverse polarity is applied to the electrodes on both sides.