An MRI apparatus includes: an image display device for displaying diffusion emphatic images of respective axes corresponding to one slice; a designation operating device for allowing an operator to designate each diffusion emphatic image targeted for rephotograph from the displayed diffusion emphatic images of axes; a diffusion emphasis imaging device for rephotographing only the axis of each diffusion emphatic image designated by the operator; a diffusion emphatic image substituting device for substituting an original diffusion emphatic image with each diffusion emphatic image obtained at the diffusion emphatic photography; and a diffusion tensor image creating device for creating a diffusion tensor image from a set of the post-substitution diffusion emphatic images.