3d display apparatus and method for providing user interface

A three-dimensional display device and a user interfacing method thereof are disclosed. The three-dimensional display device according to the embodiment comprises: a display unit to display a three-dimensional virtual object; a user input signal generation unit to generate a user input signal by detecting a handling object to handle an operation of the three-dimensional virtual object in a three-dimensional space matched with the three-dimensional virtual object; and a control unit to control the operation of the three-dimensional virtual object according to the user input signal.