To provide an image forming device having a low-cost, simple- structure, and durable mechanism that retains the distance between the photoreceptor and the rotational body.

In the image forming device, a distance retaining means (spacer rolls 12) the diameters of which are larger than the outside diameter of the rotational body by the distance d are disposed on both ends of a rotational body (developing roll 5) situated opposite to a photoreceptor 1 to keep a predetermined distance d between the developing roll 5 and the photoreceptor 1, and the distance retaining means are brought into contact with the photoreceptor 1. The position where the distance retaining means is in contact with the photoreceptor 1 in the longitudinal direction of the photoreceptor 1 is within the width of the photoreceptive layer effective film thickness that is inside the width of a photoreceptive layer coating.