Analysis of Multistory office RCC building subjected to Field earthquake. The study of seismic analysis of 20 story RCC office building considering different seismic intensities is administrated and the seismic response of such building is studied. The RCC building is sculptured with the assistance of CSI E-Tabs Software Package. The necessary dynamic characteristic of the earthquake is peak ground acceleration frequency content and period. These characteristic finding out the behavior of structure under seismic masses. The strength of the ground motion supported on PGA, frequency content and the way long the shaking continues. Ground motion has totally different frequency content resembling low, intermediate and high. Earthquake ground motion is considered in two type of condition Near Fault and Far Fault. In this current study the performance of the structure is investigated under two different ground motion conditions which are near and far from the epic center (Near Fault and Far Fault) in both normal and parallel component direction by the time history analysis method and the results are shown in terms of Acceleration, Base shear, Velocity and story displacement.