A method for producing an oil-in-water emulsion composition, comprising the steps of: agitating and thereby emulsifying a composition containing: from 5 to 35 wt% of acrylic-silicone graft copolymer which has a weight-average molecular weight of 3,000 to 100,000 and contains constituent units and of the following general formulae wherein each R 1 is a group independently selected from monovalent hydrocarbon groups, R 2 is an alkyleneoxycarbonyl group of 2 to 11 carbon atoms with the alkylene group being limited to a structure that bonds with a silicon atom, R 3 and R 4 are each independently a hydrogen atom or a methyl group, R 5 is an alkyl group of 1 to 22 carbon atoms or a hydrogen atom, m is an integer from 3 to 500, and the molar ratio between the constituent units having general formulae and, expressed as /, is from 0.02 to 1, from 5 to 35 wt% of volatile oil, from 3 to 15 wt% of polyoxyethylene sorbitan fatty acid ester having an average number of moles of added ethylene oxide of at least 10 and a hydrophilic-lipophilic balance of at least 11, and from 15 to 75 wt% of water; and subsequently treating the emulsified composition under a high shear pressure of from 30 to 300 MPa, wherein emulsion particles in the oil-in-water emulsion composition have an average particle size of 300 nm or less. agitating and thereby emulsifying a composition containing: from 5 to 35 wt% of acrylic-silicone graft copolymer which has a weight-average molecular weight of 3,000 to 100,000 and contains constituent units and of the following general formulae wherein each R 1 is a group independently selected from monovalent hydrocarbon groups, R 2 is an alkyleneoxycarbonyl group of 2 to 11 carbon atoms with the alkylene group being limited to a structure that bonds with a silicon atom, R 3 and R 4 are each independently a hydrogen atom or a methyl group, R 5 is an alkyl group of 1 to 22 carbon atoms or a hydrogen atom, m is an integer from 3 to 500, and the molar ratio between the constituent units having general formulae and, expressed as /, is from 0.02 to 1, from 5 to 35 wt% of volatile oil, from 3 to 15 wt% of polyoxyethylene sorbitan fatty acid ester having an average number of moles of added ethylene oxide of at least 10 and a hydrophilic-lipophilic balance of at least 11, and from 15 to 75 wt% of water; and from 5 to 35 wt% of acrylic-silicone graft copolymer which has a weight-average molecular weight of 3,000 to 100,000 and contains constituent units and of the following general formulae wherein each R 1 is a group independently selected from monovalent hydrocarbon groups, R 2 is an alkyleneoxycarbonyl group of 2 to 11 carbon atoms with the alkylene group being limited to a structure that bonds with a silicon atom, R 3 and R 4 are each independently a hydrogen atom or a methyl group, R 5 is an alkyl group of 1 to 22 carbon atoms or a hydrogen atom, m is an integer from 3 to 500, and the molar ratio between the constituent units having general formulae and, expressed as /, is from 0.02 to 1, from 5 to 35 wt% of volatile oil, from 3 to 15 wt% of polyoxyethylene sorbitan fatty acid ester having an average number of moles of added ethylene oxide of at least 10 and a hydrophilic-lipophilic balance of at least 11, and from 15 to 75 wt% of water; and subsequently treating the emulsified composition under a high shear pressure of from 30 to 300 MPa, wherein emulsion particles in the oil-in-water emulsion composition have an average particle size of 300 nm or less.