The present disclosure provides an image processing device including: a radiographic image acquisition section that acquires a radiographic image, the radiographic image generated by stitching together radiographic images of an imaging subject imaged by plural radiation detectors, each of which includes a detection face for detecting radiation； a purpose acquisition section that acquires information indicating an interpreting purpose； and an adding section that adds a predetermined assist line to the radiographic image, on the basis of at least one of a reference object corresponding to the interpreting purpose in the radiographic image acquired by the radiographic image acquisition section or the information indicating the interpreting purpose.
