A method for producing a hair cosmetic, comprising the following steps to: Step: a step of mixing a cationized hydroxypropyl cellulose and an anionic surfactant (C') to prepare a mixture, Step: a step of mixing the mixture obtained in the step with an oil to prepare an emulsion, Step: a step of mixing the emulsion obtained in the step with a surfactant and water to give a hair cosmetic, wherein the oil has an amount of dissolution in 100 g of water at 20°C of 0 to 1 g, and wherein the cationized hydroxypropyl cellulose has an anhydroglucose-derived main chain represented by the following general formula, and has a degree of substitution with cationized ethyleneoxy group of from 0.01 to 2.9 and a degree of substitution with propyleneoxy group of from 0.1 to 4.0: wherein, in the formula, R 1, R 2 and R 3 each independently represent a substituent having a cationized ethyleneoxy group and a propyleneoxy group represented by the following general formula; n indicates a mean degree of polymerization of anhydroglucose and is a number of from 50 to 5000, wherein, in the formula, one of Y 1 and Y 2 is a hydrogen atom and the other is a cationic group represented by the following general formula; PO represents a propyleneoxy group; p indicates the number of cationized ethyleneoxy groups ((-CH(Y 1)-CH(Y 2)-O-) in the general formula and q indicates the number of propyleneoxy groups (-PO-) therein, each representing 0 or a positive integer; in case where both of p and q are not 0, the addition sequence of the cationized ethyleneoxy group and the propyleneoxy group is not defined, and in case where p and/or q are/is 2 or more, a binding form may be any of like a block co-polymer or like a random co-polymer, wherein, in the formula, R 4, R 5 and R 6 each independently represent a linear or branched alkyl group having from 1 to 3 carbon atoms, and X - represents an anionic group. Step: a step of mixing a cationized hydroxypropyl cellulose and an anionic surfactant (C') to prepare a mixture, Step: a step of mixing the mixture obtained in the step with an oil to prepare an emulsion, Step: a step of mixing the emulsion obtained in the step with a surfactant and water to give a hair cosmetic, wherein the oil has an amount of dissolution in 100 g of water at 20°C of 0 to 1 g, and wherein the cationized hydroxypropyl cellulose has an anhydroglucose-derived main chain represented by the following general formula, and has a degree of substitution with cationized ethyleneoxy group of from 0.01 to 2.9 and a degree of substitution with propyleneoxy group of from 0.1 to 4.0: wherein, in the formula, R 1, R 2 and R 3 each independently represent a substituent having a cationized ethyleneoxy group and a propyleneoxy group represented by the following general formula; n indicates a mean degree of polymerization of anhydroglucose and is a number of from 50 to 5000, wherein, in the formula, one of Y 1 and Y 2 is a hydrogen atom and the other is a cationic group represented by the following general formula; PO represents a propyleneoxy group; p indicates the number of cationized ethyleneoxy groups ((-CH(Y 1)-CH(Y 2)-O-) in the general formula and q indicates the number of propyleneoxy groups (-PO-) therein, each representing 0 or a positive integer; in case where both of p and q are not 0, the addition sequence of the cationized ethyleneoxy group and the propyleneoxy group is not defined, and in case where p and/or q are/is 2 or more, a binding form may be any of like a block co-polymer or like a random co-polymer, wherein, in the formula, R 4, R 5 and R 6 each independently represent a linear or branched alkyl group having from 1 to 3 carbon atoms, and X - represents an anionic group.