On the film casting process, the following phenomena occur, 1) neck-in, the film width becomes smaller than the die width, 2) Edge bead, the film thickness at edge becomes larger than that at the film center. One of the requirement points on the film casting process is to manufacture the film with uniform thickness. In this study, we tried to predict the cross-sectional shape of die exit on the film casting process in order to manufacture the film with uniform thickness by using a viscoelastic flow simulation. The Phan-Thien Tanner (PTT) model was employed as the constitutive equation. By this simulation, we could get the cross-sectional shape of die exit in order to manufacture the film with uniform thickness. The width of this die exit except at edge became large and the thickness at edge of this die exit became small when the draw ratio increased because the neck-in and edge bead phenomena occurred on the film casting process. The width of the die exit at same draw ratio was almost independent of the fluid characteristics, i.e., the viscosity ratio of uniaxial elogational viscosity to planar elongational one at same elongation rate. However, the die thickness region with same value became increased when this viscosity ratio increased. And the deformation from rectangular cross-section became prominent at high draw ratio.