The fatigue strength of the press-fiteed shafts is affected by the configuration near the end of fit. In this study, the above problems were investigated from a view point of stress concentration by using the two dimensional photoelasticity. The configuration near the end of fit was decided as follows. The configuration of the hub was kept constant while shafts were varied as plain and filleted. Furthermore, the relative position between the end of fit and shoulder was varied. Then, it was studied what relations were there among the configuration near the end of fit, the concentration of the bending stresses and the fit pressure, based upon more systematic experiments. The obtained results indicated a good agreement with the results of the bending fatigue tests, and the effects of the overhang quantities and the configuration of the fillet on the stress concentration were clarified.