A driving method of a 3D image display device, comprising: determining whether a display device is operating in a 2D mode for displaying only two-dimensional images or a 3D mode for displaying three-dimensional images; displaying an image at a predetermined 2D display frequency when it has been determined that the display device is operating in the 2D mode; and displaying a left-eye image and a right-eye image at a predetermined 3D display frequency higher than the 2D display frequency when it has been determined that the display device is operating in the 3D mode, wherein the displaying of the left-eye image and the right-eye image includes: applying data voltages representing the left-eye image or the right-eye image to a data line (D1 to Dm); and sequentially applying a gate-on voltage to a plurality of gate lines (G1 to Gn) crossing the data line (D1 to Dm); characterized in that the data voltages applied to the same pixel have an identical polarity and an identical magnitude throughout at least two consecutive frames, and the gate-on voltage is sequentially applied to the plurality of gate lines (G1 to Gn) crossing the data line (D1 to Dm) at an interval of a compensation gate-on application time that is calculated based on a total data delay value with which a data voltage is delayed along the data line (D1 to Dm), and when the data voltages representing the left-eye image or the right-eye image are consecutively applied for x number of frames, x is chosen such that a time acquired by multiplying a time acquired by subtracting a total gate delay value from an effective charge time in the 3D mode by x is larger than a time acquired by subtracting the total gate delay value from an effective charge time in the 2D mode. determining whether a display device is operating in a 2D mode for displaying only two-dimensional images or a 3D mode for displaying three-dimensional images; displaying an image at a predetermined 2D display frequency when it has been determined that the display device is operating in the 2D mode; and displaying a left-eye image and a right-eye image at a predetermined 3D display frequency higher than the 2D display frequency when it has been determined that the display device is operating in the 3D mode, wherein the displaying of the left-eye image and the right-eye image includes: applying data voltages representing the left-eye image or the right-eye image to a data line (D1 to Dm); and sequentially applying a gate-on voltage to a plurality of gate lines (G1 to Gn) crossing the data line (D1 to Dm); applying data voltages representing the left-eye image or the right-eye image to a data line (D1 to Dm); and sequentially applying a gate-on voltage to a plurality of gate lines (G1 to Gn) crossing the data line (D1 to Dm); characterized in that the data voltages applied to the same pixel have an identical polarity and an identical magnitude throughout at least two consecutive frames, and the gate-on voltage is sequentially applied to the plurality of gate lines (G1 to Gn) crossing the data line (D1 to Dm) at an interval of a compensation gate-on application time that is calculated based on a total data delay value with which a data voltage is delayed along the data line (D1 to Dm), and when the data voltages representing the left-eye image or the right-eye image are consecutively applied for x number of frames, x is chosen such that a time acquired by multiplying a time acquired by subtracting a total gate delay value from an effective charge time in the 3D mode by x is larger than a time acquired by subtracting the total gate delay value from an effective charge time in the 2D mode.