1. A method of displaying a three dimensional (3D) image in a mobile communication terminal, the method comprising: displaying an image comprising at least one object; detecting a touch event on an object among the at least one object with the image displayed for selection of the object; changing a three dimensional depth of the object if a first touch gesture is detected while maintaining a touch state which is occurred by the touch event; and performing a function related to the object if a second touch gesture is detected while maintaining the touch state which is occurred by the touch event, wherein changing the three dimensional depth of the object comprises: checking the three dimensional depth of the selected object; determining the three dimensional depth of the selected object based on the checked three dimensional depth without any additional input; and displaying the selected object reflecting the determined three dimensional depth.