Hydraulic conductivity of the jointed rocks is one of the main input parameters for a all groundwater modellings and assessments. Based on the Darcy’s law for porous media, this parameter relates the flow rate to the pressure gradient. Rock discontinuities play important role in water circulation within the jointed rocks. They occur at various forms and scale and provide pathways for water flow. Water flows inside discontinuities and the magnitude and the orientation of the hydraulic conductivity is a function of the geometrical properties of discontinuities. Based on the cubic law, the hydraulic aperture of rock discontinuities has the most significant effect on the hydraulic conductivity of jointed rocks. The hydraulic aperture of rock discontinuities is a stress-dependent parameter and reduces with increasing applied stress. Furthermore, the horizontal stress magnitude is typically proportional to the stiffness of the material in which the measurement was taken. The horizontal stress in softer strata is lower than the stress in the stiffer units. Therefore, the geomechanical considerations are very important for hydraulic conductivity estimation of the jointed rocks. This paper presents the analytical and semi-analytical methods which developed by the authors to incorporate the geomechanical characteristics of the jointed rocks to estimate the hydraulic conductivity. The application of these methods for several real cases shows that the anisotropic conductivity of the jointed rocks can be estimated by using its geomechanical characteristics. The estimated hydraulic conductivity components have been compared with the measured values which confirmed the reliability of the proposed formulations.