A medical image generation apparatus including: a 4D image data generation unit generating 4D image data composed of a plurality of 3D image data blocks each having information indicating a number in chronological order of the 3D image data blocks using image information acquired by taking images of an object; and an image generation unit generating movie data composed of a plurality of 2D image data blocks generated from the plurality of 3D image data blocks constituting the four-dimensional image data and generating relevant information associating each of the two-dimensional image data blocks constituting the movie data with one of the 3D image data blocks which is the source of the 2D image data block.