The distribution coeMcients of maltoeligosaccharides with degrees of polymerization (d.p.) of 1 to 7 on cation-exchange resins (Amberlites HFS-471X and CG-60) with various divinylbenzene (DVB) contents and alkali-ion forms were determined by the moment analysis of elution curves of the saccharides. The distribution coeMcients were largely dependent on both the DVB content and the ionic form, as -'etl as en d.p. The resin with the higher DVB content gave the smftller coeMcient. As the radi"s of the hydrated ion became larger, the distribution coeMcient was reduced. The resi"-phase diffusion and axial dispersion c eMcients were also determined for maltooligosaccharides with d.p. of 1 to 3. Regardless of the DVB content and the ionie form, the resin-phftse difTbsion coeMcient was correlated with the motecular diffusivity of each solute by a parallel pore model with a tortuosity factor of4.0. The mixing lengths of flow for Amberlites HFS-471X and CG-60 were 1.9 and 1.5 times Rs long as theiT mean diameters, respectively. By using the parameters eyaluated, the effects of some operating yariables oll the resolution of maltooligosaccharides with d.p. of i and i+ 1 (i= 1 to 6) are discussed.