Recently, fringe field switching (FFS) mode in liquid crystal displays is mainly used for high imagequality liquid crystal displays (LCDs). Electro-optic characteristics of FFS-LCDs liquid crystal (LC) depend onmany cell parameters such as electrode structure, retardation, rubbing angle, cell gap and sign and magnitude ofdielectric anisotropy. In this study, we have investigated electro-optic characteristics of the FFS mode as afunction of a sign of dielectric anisotropy while keeping the magnitude of dielectric anisotropy of liquid crystalsand other cell parameters to be the same. The results show that for the LC with negative dielectric anisotropy(-LC) shows lower operating voltage than that of a LC with positive dielectric anisotropy by about 10%, owingto easier elastic deformation responding to applied voltage in a -LC. The result will help understand the intrinsicswitching behavior of the FFS mode.