Image forming apparatus

An image forming apparatus comprising:

• a photosensitive drum configured to bear a toner image;
• a rotatable intermediate transfer belt configured to come into contact with the photosensitive drum at a first contact area on an outer peripheral surface thereof, bear the toner image transferred thereto from the photosensitive drum, and transfer the toner image onto a recording material at a secondary transfer area;
• and
• a transfer roller configured to come into contact with an inner peripheral surface of the intermediate transfer belt at a second contact area, and transfer the toner image on the photosensitive drum onto the intermediate transfer belt by being applied a transfer bias,
• wherein the transfer roller is disposed such that an upstream end of the second contact area is positioned downstream of a downstream end of the first contact area and upstream of the secondary transfer area with respect to a rotation direction of the intermediate transfer belt,
• wherein the intermediate transfer belt is formed to have different resistivities on the outer peripheral surface side and the inner peripheral surface side thereof, and in a case where a surface resistivity measured on the outer peripheral surface of the intermediate transfer belt is G and a surface resistivity measured on the inner peripheral surface of the intermediate transfer belt is N, 0.75≤N/G≤1.2 is satisfied, and
• wherein 1.0×109Ω/□≤N≤1.0×1013Ω/□ is satisfied.