Three-dimensional data is associated with a first imaging area including a left breast of a subject to be examined and a second imaging area including a right breast of the subject. An image displaying apparatus includes a specifying unit that specifies a nipple position of the left breast on the basis of positional information of pressure plates from the three-dimensional data. The image displaying apparatus also includes a generating unit that generates, by a maximum intensity projection, four projection images from the three-dimensional data. Two of the projection images respectively correspond to a plurality of divided areas of the left breast in the first imaging area divided on the basis of the specified nipple position. Two of the projection images respectively correspond to a plurality of divided areas of the right breast in the second imaging area. The four projection images are simultaneously displayed.