In this in-vitro study two lower dentulous models were used to represent Kennedy class III modification 1.The abutment teeth were the canines and the second molars bilaterally. Removable partial dentures were constructed on these models with different types of retainers. In model I, the retainers used were RPI and Akers clasps while in model II, the telescopic retainers were used. Three dimensional finite element stress analysis was used to evaluate the stress distribution pattern transmitted to the abutment teeth and supporting structures, as follows:Geometrical three dimensional modeling was performed by C.T scanning of the models and using Mimics soft ware. These models were introduced into Ansysis 11 program for analysis. Each model was loaded bilaterally by a simple load of 100 N in vertical tissueward direction at the centre of edentulous span (area of second premolar-first molar). Stresses generated were recorded in the abutment teeth, supporting structures, metal framework, acrylic teeth and denture base in both models. The amount of displacement was also recorded in each model during load application. Data was collected and tabulated to compare between the different designs proposed in this study.The results revealed that there are differences between the two models. The amount of displacement in model I was higher than that of model II. The stresses induced in model II were remarkable and higher than that of model I but they were almost equally distributed to the abutment teeth and supporting structures compared to model I.