Image display device for improving three-dimensional effect of stereo-scopic image and method thereof

A stereoscopic image displaying apparatus for improving three-dimensional effects of an image and a method thereof are provided to control disparity according to control disparity for inputted first and second images, thereby three-dimensionally outputting an inputted image on a screen. A disparity estimating unit(110) estimates disparity between first and second images generated by photographing the same object in different directions. A calculating unit(120) calculates control disparity for the first and second images by using a histogram obtained by calculating a generation frequency of the estimated disparity. An output unit(130) applies the calculated control disparity to the first and second images, and outputs the first and second images applied with the calculated control disparity.