The paper presents the preparation and rheological behavior of exudate gum obtained from tree gum cherry (Prunus cerasus) in aqueous medium. The shear and oscillatory flow experiments as well as creep-recovery tests, performed in different conditions of shear at 37 degrees C, show peculiar behavior of the samples as a function of their composition. Rheological parameters are very sensitive to variations in molecular structure or intermolecular interactions, and they are useful in developing structure-function relationships for polysaccharide-based systems.