Spatial display device, spatial method, and program

A spatial display device that displays a projection image consisting of a three-dimensional space projected on a two-dimensional plane, including a position information acquisition portion that acquires a first object position information that shows a position of a first object in said three-dimensional space and a second object position information that shows a position of a second object in said three-dimensional space; and a positional relation information acquisition portion that acquires positional relation information that shows the positional relation in three-dimensional space between the first object and the second object based on the first object position information and the second object position information acquired by the position information acquisition portion.