Object selecting device, object selection program, and an object selection method

Depth selection unit 18, based on the depth selection instruction entered by the user, selects a depth selected position indicating a position in the depth axis Z. Display determination unit 19, in the depth space, it is determined whether located on either the back side located on the near side with respect to each real object RO is a depth selected position Zs, the real object RO positioned on the far side tag T1 There is extracted as a real object RO of the display object to be displayed. Drawing unit 22 determines the display position on the display screen of the real object RO of the display target extracted by the display determination unit 19, to draw the tag T1 to the determined display position.