To suppress the reduction of image quality of a decoded image.

An image processing device includes: if a predictor for use when generating a prediction image of a target image to be processed is different from a predictor associated with a peripheral image located in the vicinity of the target image, a decision unit for deciding that a block distribution is easy to be observed in the target image; a control unit for, when the decision unit decides the block distribution is easy to be observed, setting the intensity of deblock filter processing on the target image to be relatively higher; and a filtering unit for, according to the control of the control unit, performing deblock filtering processing on the target image.