A method for producing an emulsion composition of an organopolysiloxane having a branched structure, the method comprising the steps of: preparing an emulsion composition by emulsifying a mixture comprising 100 parts by weight of organopolysiloxane which is organopolysiloxane of general formula below, or is a mixture of organopolysiloxanes of general formula and general formula below, and has an octamethylcyclotetrasiloxane content of up to 1,000 ppm wherein each of R 1 and R 2 independently is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms; subscript n is a number such that the organopolysiloxane has a viscosity at 25°C of at least 200 mm 2 /s and up to 100,000 mm 2 /s as measured with an Ostwald viscometer, and subscripts a, b, c and d are numbers which satisfy the conditions a ≥ 3, b ≥ 5, c+d ≥ 1, and 10 ≤ a+b+c+d ≤ 1,000, from 1 to 8 parts by weight of surfactant, and (C-1) from 1 to 10,000 parts by weight of water; and after optionally adding to the resulting emulsion composition (C-2) from 0 to 10,000 parts by weight of water, carrying out emulsion polymerization at a temperature below 40°C in the presence of an acid catalyst, provided that addition of the acid catalyst may be omitted when the surfactant has a catalytic action, wherein the formed organopolysiloxane has a 15 wt% toluene solution viscosity at 25°C of at least 200 mPa·s as measured with a rotational viscometer, the amount of octamethylcyclotetrasiloxane included in the formed organopolysiloxane is up to 3,000 ppm as measured by gas chromatography, and the average size of the resulting emulsion particles, being the median diameter as measured by laser diffraction/scattering method, is up to 1 μm. preparing an emulsion composition by emulsifying a mixture comprising 100 parts by weight of organopolysiloxane which is organopolysiloxane of general formula below, or is a mixture of organopolysiloxanes of general formula and general formula below, and has an octamethylcyclotetrasiloxane content of up to 1,000 ppm wherein each of R 1 and R 2 independently is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms; subscript n is a number such that the organopolysiloxane has a viscosity at 25°C of at least 200 mm 2 /s and up to 100,000 mm 2 /s as measured with an Ostwald viscometer, and subscripts a, b, c and d are numbers which satisfy the conditions a ≥ 3, b ≥ 5, c+d ≥ 1, and 10 ≤ a+b+c+d ≤ 1,000, from 1 to 8 parts by weight of surfactant, and (C-1) from 1 to 10,000 parts by weight of water; and 100 parts by weight of organopolysiloxane which is organopolysiloxane of general formula below, or is a mixture of organopolysiloxanes of general formula and general formula below, and has an octamethylcyclotetrasiloxane content of up to 1,000 ppm wherein each of R 1 and R 2 independently is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms; subscript n is a number such that the organopolysiloxane has a viscosity at 25°C of at least 200 mm 2 /s and up to 100,000 mm 2 /s as measured with an Ostwald viscometer, and subscripts a, b, c and d are numbers which satisfy the conditions a ≥ 3, b ≥ 5, c+d ≥ 1, and 10 ≤ a+b+c+d ≤ 1,000, from 1 to 8 parts by weight of surfactant, and (C-1) from 1 to 10,000 parts by weight of water; and after optionally adding to the resulting emulsion composition (C-2) from 0 to 10,000 parts by weight of water, carrying out emulsion polymerization at a temperature below 40°C in the presence of an acid catalyst, provided that addition of the acid catalyst may be omitted when the surfactant has a catalytic action, wherein the formed organopolysiloxane has a 15 wt% toluene solution viscosity at 25°C of at least 200 mPa·s as measured with a rotational viscometer, the amount of octamethylcyclotetrasiloxane included in the formed organopolysiloxane is up to 3,000 ppm as measured by gas chromatography, and the average size of the resulting emulsion particles, being the median diameter as measured by laser diffraction/scattering method, is up to 1 μm. (C-2) from 0 to 10,000 parts by weight of water, carrying out emulsion polymerization at a temperature below 40°C in the presence of an acid catalyst, provided that addition of the acid catalyst may be omitted when the surfactant has a catalytic action,