An image diagnosis support device 10 includes an image acquisition section 61 which acquires a tomographic image including a desired organ of an object from a medical image scanning apparatus 2 or a magnetic disk 13; a reference region extraction section 62 which extracts a reference region representing a reference in the organ of interest from the tomographic image acquired by the image acquisition section 61; an organ region extraction section 63 which extracts an organ region representing a region of the organ of interest from the tomographic image acquired by the image acquisition section 61; an organ shape information calculation section 64 which calculates organ shape information regarding the shape of the organ of interest from the reference region extracted by the reference region extraction section 62 and the organ region extracted by the organ region extraction section 63; and display control section 11 which displays on a monitor 15, which is a display device, the organ shape information calculated by the organ shape information calculation section 64.