The utility model provides an image forming device. Embodiment's image forming device has casing, developer roll and sensitization drum. The developer roll has image area and a pair of non - image area. Image area follows the axial of the rotation axis of developer roll and extends. A pair of non - image area is set up in the axial both sides for image area. Image forming device still has the correction part. Correct part from the radial observation with axial vertical, the downstream side of following regulation direction of rotation in the position that NOT AND image area overlaps covers theclearance. It will correct to the ascending image area of axle side along the mobile air of regulation direction of rotation in the clearance to correct parts. The utility model discloses an it willcorrect to the ascending image area of axle side along the mobile air of the direction of rotation of sensitization drum in the clearance to correct parts, can suppress the tinting color that the developer contained by simple structure and pollute other units in the device. Consequently, maximization that, can suppression device and zero components cost's rising.