Sorption capacities of three wheat cellulose preparations were examined. The run of sorption isotherms was determined using the static-desiccator method; BET equation was calculated and the dimensions and volume of capillaries of the examined material were determined from the run of adsorption isotherms in the area of capillary condensation. In the area of monolayer as well as in that of capillary condensation, the preparation of wheat cellulose WF200 was characterised by the highest sorption capacity and specific surface of sorption. In spite of significant differences in the degree of micronisation, the preparations of cellulose: WF 400 and WF 600 were characterised by similar values of sorption capacity in both areas, as well as of specific surface of sorption and volume of capillaries. The studies showed that the technological process, determining the degree of micronisation, had an influence on sorption properties of cellulose preparations and, thereby, on the possibilities of their application.