To provide an image forming apparatus designed so that secondary transfer efficiency is high, releasability of transfer paper is excellent, and jamming of paper is made less likely to occur.

The image forming apparatus includes an intermediate transfer belt 14 to which a toner image formed on each of photoreceptor drums 10 is transferred. The image forming apparatus transfers the toner image on the intermediate transfer belt 14 onto paper S by a secondary transfer unit 17 that has a secondary transfer belt 30. Also, the image forming apparatus has a pre-transfer charger 18 which charges the toner image on the intermediate transfer belt 14 before transferring it onto the paper S. The resistances of the intermediate transfer belt 14 and secondary transfer belt 30 satisfy 102≤(the resistance of the intermediate transfer belt/the resistance of the secondary transfer belt)<105.