Abstract: This study presents nonlinear finite element analysis of slab-column connection in order to investigate the effect of using CFRP (Carbon Fiber Reinforced Polymer) sheets on their structural behavior. Verification of study needs to calibrate the un-strengthened analytical models by available experimental data. In this case two groups of models with three layers of Solid 65 elements throughout the depth of the slabs were analyzed. One of them was consisted of the smeared reinforcement throughout the entire slab which indicated a reasonably accurate simulation of the load-deflection curves with a steel volume ratio of 0.028 and also gives a good indication of the cracking behavior of the slabs. In the other group, smeared reinforcement located at bottom layer was used. In both groups the pre-cracking branch of the different curves follows the experimental results very closely. Beyond cracking, the models of last group defined appear stiffer. The punching truncated pyramid of control model is in a very close agreement with the experiment. Slab model by using CFRP plates introducing to program by Solid 46 elements, have been analyzed. Results indicated that final deflection of slab has been increased of 36% while strength of the slab has been increased slightly. Also, strengthening of slab with increasing steel volume ratio in the central zone affects on behavior of the slabs with an increase in both, the final load and deflection.