A method for producing a phytosterol/phytostanol-containing composition is provided that facilitates dispersion in-water of a phytosterol and/or phytostanol (phytosterol/phytostanol), which are difficult to dissolve in water, inhibits the occurrence of precipitation and coagulation (ring formation) for a long period of time even when incorporated in water, and can maintain a stable dispersed state. The method of the present invention has at least one of the following steps (1) to (3): (1) mixing at least one type selected from a pulverized phytosterol and phytostanol with an aqueous raw material containing an emulsifier having an HLB value of 6 to 16; (2) pulverizing at least one type selected from a phytosterol and a phytostanol followed by mixing with an aqueous raw material containing an emulsifier having an HLB value of 6 to 16; and (3) mixing at least one type selected from a phytosterol and a phytostanol with an aqueous raw material containing an emulsifier having an HLB value of 6 to 16, and pulverizing the phytosterol and/or phytbstanol in the mixture.