To facilitate an operation setting a plurality of specification points on a same position by superimposing.

This diagnostic imaging apparatus includes an image display device 16 displaying a diagnostic image, an input means 18 moving a position specification mark displayed on the image display means and setting a specification point on the diagnostic image, and a distance measuring means 19 measuring a mutual distance between the plurality of specification points set by the input means on the diagnostic image. This diagnostic imaging apparatus is characterized in having a specification point setting support means 20 setting a new specification point on the existing specification point by superimposing when the position specification mark moved by the input means approaches to the existing specification point already set on the diagnostic image.