A terminal apparatus includes: a display unit configured to display a projection image of a three-dimensional object on a two-dimensional display screen; an imaging unit configured to capture an image of an operator who is in a state of viewing the display screen; a changing unit configured to change a viewpoint position relative to the three-dimensional object in response to a position of an image of the operator's face relative to the captured image; and a projection image generator configured to obtain a projection image generated by projecting each portion of the three-dimensional object viewed from the viewpoint position onto a predetermined projection plane.