O-carboxymethylated chitosan (O-CMCh) aqueous solution (I) and Ethyletheramine Chitosan (EACS) aqueous solution (II) were blended with cellulose N-methylmorpholine N-oxide solution, and corresponding polyblends (Polyblend I and II) were obtained. The rheology of this three liquids, (cellulose solution, Polyblend I and II), was investigated in this study. Then the influence on rheology, because of the addition of chitosan derivative, was discussed.