Densities, limiting molar conductivities (Lambda(0)), and Walden products (Lambda(0)eta) for 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF(4)])-sucrose-water solutions were determined at 298.15 K. The measured densities were used to calculate the apparent molar volumes of sucrose (V(Phi,S)) and [Bmim][BF(4)] (V(Phi,IL)) in the studied solutions. Infinite dilution apparent molar volumes, V(Phi,S)(infinity) and V(Phi,IL)(infinity), have been evaluated, together with the standard transfer volumes of the sucrose (Delta(t)V(S)(infinity)) from water to aqueous solutions of [Bmim][BF(4)] and those of [Bmim][BF(4)] (Delta(t)V(IL)(infinity)) from water to aqueous sucrose solution. It was shown that the Delta(t)V(S)(infinity) and Delta(t)V(IL)(infinity) values are positive and increase with increasing molalities of [Bmim][BF(4)] and sucrose, respectively. The volumetric interaction parameters for [Bmim][BF(4)]-sucrose pairs in water were also obtained and interpreted by the structural interactions model. Additionally, the Lambda(0) values for [Bmim][BF(4)] decrease with the molality of sucrose (m(S)), as well as Walden products (Lambda(0)eta), due to the preferential solvation of ions by sucrose molecules.