The sleeve riveting method is the fastening process by which the plate parts are fastened with bolt and nut formed from the sleeve by using the swaging tool. The fastening performance of this method is influenced by the material flow of the sleeve into the thread grooves of a bolt. A series of experiments on the sleeve riveting process were carried out in the plane strain condition in order to observe the material flow of the specimen different in thickness of the sleeve and with or without the notch. In this research, it is clear that the punch load depends on the thickness of the sleeve and decreases due to the existence of the notch and that the notch influences the filling of the sleeve into the grooves of a bolt.