Tunnels are constructed in mountainous region to provide straight and comfortable routes. Often, mountains consist of rock mass, which are of highly vulnerable in nature because of the presence of random discontinuities. In Himalayan region of India, many tunnels are proposed to be constructed due to their high strategic importance because these tunnels help to provide the troops quick access to the border areas in all weather conditions. Himalayan region is seismically very active and falls in seismic zones IV and V. Seismic analysis of tunnels situated in Himalayan region considering jointed rock mass is hardly reported in the literature and the same has been studied in the present research work. In this research work, the dynamic response in terms of acceleration and vertical deformations in static as well as in dynamic conditions are evaluated at the crown and invert of the tunnel. The discontinuity in the rock mass is considered by jointed rock model with different orientation of joints. In the present study, FE analysis using 15-noded triangular elements has been carried out using PLAXIS 2D software to examine the harmonic response of tunnel in jointed rock mass and then effect of frequency of excitation is also examined.