Viscosity B-coefficients for sodium halides (NaX, X- = Cl-, Br-, and I-) in aqueous monosaccharides (d-glucose, d-galactose, d-xylose, and d-arabinose) were determined from density and viscosity (eta) measurements at 298.15 K. The contributions of solvent property (B1) and the electrolyte-solvent interaction (B2) to the B-coefficient were also obtained together with molar activation energies (Delta(mu)E0(not equal)) of the electrolytes for viscous flow of the aqueous saccharide-electrolyte solution. In addition, 1H spin-lattice relaxation times (T1) were measured for two glycosides in D2O with and without sodium halides. The results show the interactions between X- and the saccharides are in the following order: Cl- > Br- > I-. A linear relationship is observed between the relaxation rate (1/T1) and electrolyte concentration.