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Aqueous monoethanolamine (MEA) solution (15 wt%) was mixed with 5, 10, 15 wt% ionic liquid namely, 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim][BF₄]). CO₂ solubility in aq. MEA and aq. MEA-IL mixtures was measured experimentally at T = 298.15 K and over a pressure range of 100 to 3000 kPa. The addition of IL in the aq. MEA solutions affected its solubility. The solubility of all the mixtures increased with increase in pressure.