The kinetic coefficients of critical polymer solutions are calculated by the mode coupling theory. We predict that the critical divergence of viscosity should be suppressed with increasing the molecular weight. The diffusion constant and the dynamic structure factor are also calculated. The present results explicitly show that the critical dynamics of polymer solutions should be affected by an extra spatio‐temporal scale intrinsic to polymer solutions, and are consistent with the experiment of Tanaka,et al.© 2004 American Institute of Physics