Although a lamina cribrosa is deformed in glaucoma, in a method in a related art, a thickness of retinal layer or choroid is measured and a deformation of the lamina cribrosa is not detected. When glaucoma is diagnosed, it is desirable to analyze a shape of the lamina cribrosa and present its analysis result at a high visibility. An image processing apparatus is provided that comprises: an image obtaining unit that obtains a tomographic image of a subject's eye; an extracting unit that extracts a lamina cribrosa from the tomographic image; and a display control unit that controls a display means to display a display form showing a shape of the extracted lamina cribrosa.