An image forming device has an imaging unit including: a rotating body; an exposure unit forming an electrostatic latent image on the rotating body; a developing unit developing the latent image using developer to form an image; and a transfer unit transferring the image to a recording medium, a memory storing data on correspondence between first image data, second image data and a first correction amount, the first image data representing a first latent image formed by a first turn of the rotating body, the second image data representing a second latent image formed by a second turn of the rotating body, and the first correction amount used for correcting the second image data so that density of the image on the recording medium closer to density of the second latent image; a correction amount determining unit determining the first correction amount corresponding to the first and second image data based on the data stored in the memory; and a correcting unit correcting the second image data based on the first correction amount.