An inspection device includes a processor configured to perform a first inspection of using original image data as first reference image data and collating the first reference image data with at least one of plural pieces of read image data obtained by reading image-formed matters obtained by forming the first reference image data on plural recording media, and register read image data satisfying a predetermined criterion among the plural pieces of read image data as a result of the first inspection, as second reference image data for a second inspection different from the first inspection.