According to aspects of embodiments of the present invention a touch screen display device includes: a touch sensor; a touch controller configured to detect a position touched on the touch sensor; and a touch correcting unit configured to correct an initial touch position detected by the touch controller to a final touch position, wherein the touch correcting unit comprises: a first computing unit configured to convert the initial touch position to a temporary touch position; a second computing unit configured to compute a touch movement amount between the initial touch position and the temporary touch position; and a third computing unit configured to compute the final touch position by subtracting the touch movement amount from the initial touch position.