A parts selecting apparatus includes a unit configured to extract parts included in a two-dimensional closed area from a plurality of parts constituting a three dimensional object in response to a user action specifying the two-dimensional closed area on a display screen that displays a two-dimensional image of the three-dimensional object, and to cause information identifying the extracted parts to be displayed, a unit configured to cause a two-dimensional image of the three-dimensional object with a selected part being highlighted to be displayed on the display screen in response to a user action selecting the selected part from the extracted parts, and a unit configured to switch the two-dimensional image of the three-dimensional object with the selected part being highlighted to another two-dimensional image for which at least one of a view angle or a magnification is changed.