A display device includes an operating body detection unit detecting an operating body disposed over a display screen, a position determination unit determining a three-dimensional position of the operating body from the detection result and outputting the three-dimensional position as position information for the operating body, a position designation unit designating a three-dimensional position over the display screen, a guide information generation unit generating guide information which requests a user to perform a predetermined action for an operating body around the designated three-dimensional position and then dispose the operating body at the designated three-dimensional position, a correction information generation unit generating correction information from an error between the designated three-dimensional position and a determination result of the three-dimensional position of the operating body disposed according to the guide information, and a position correction unit correcting a three-dimensional position of the operating body based on the correction information.