PURPOSE: To provide a radiographic apparatus which facilitates the manupiration to insert a guide wire/catheter into the target site by referring to the live radiographic image.

CONSTITUTION: The radiographic apparatus comprises a means A which specifies the range of blood vessel to be shown out of the vessel image produced by a contrast midium, a means B which automatically extracts the outline of the specified vessel, a means C which draws the marks to encompass the vessel outline, and a means D which moves the marks along the vessel outline.