Precise vapor pressure osmometry (VPO) measurements at 308.15 K were conducted for solutions of three ILs, 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]), 1-butyl-3-methylimidazolium bromide ([Bmim][Br]), and 1-butyl-3-methylimidazolium hydrogen sulfate ([Bmim][HSO4]), in aqueous solutions of three carbohydrates, sucrose, maltose, and maltitol, as Well as for solutions of the carbohydrates in aqueous solutions of these ILs. Because of the unfavorable IL - carbohydrate interactions, all the investigated IL + carbohydrates aqueous systems show the soluting-out effect and vapor liquid equilibria behavior of these systems in the monophasic region show the negative deviation from the semi-ideal behavior (aw + 1 < aw(IL)(o) + a(wC)(o) and Delta p < Delta p(IL)(o) + Delta p(C)(o)). For a certain carbohydrate and at the same molality of IL, the magnitude of the departures for the investigated ILs follows the order: [Bmina][BF4] > [Bmirn][HSO4] >> [Bmim] [Br]. In the case of [Bmim] [BF4]/carbohydrate aqueous systems, which have a phase separation capability, the soluting-out power of the carbohydrates on [Bmim] [BF4] in aqueous solutions (or negative deviation from the semi-ideal behavior) reduced by decreasing the hydrophilicity of the carbohydrates. Aqueous [Brnim] [Br] /carbohydrate and [Binim] [HSO4]/carbohydrate systems are unable to form the ABS, and the soluting-out effect of the ILs on the aqueous carbohydrate solutions appears in the form of precipitation of sugars from the aqueous solutions.