A stereoscopic image display and a method for compensating for a crosstalk of the stereoscopic image display are disclosed. The stereoscopic image display includes a crosstalk compensation circuit and a display element. The crosstalk compensation circuit detects an input frame frequency, performs over driving control (ODC) modulation on 3D data to firstly compensate for a crosstalk of the 3D data, and multiplies the firstly compensated 3D data by a constant value, which is previously determined depending on the detected input frame frequency and is greater than zero and equal to or less than 1, to finally compensate for the crosstalk of the 3D data. The display element displays left eye image data and right eye image data included in the finally compensated 3D data in a time division manner.