A foam forming aerosol product comprising a double structure container having a propellant filling space, two independent liquid concentrate filling spaces, and a discharging mechanism for simultaneously discharging contents filled in the two liquid concentrate filling spaces, wherein: the propellant filling space in the double structure container is filled with a propellant composed of a compressed gas; a first liquid concentrate composition containing an organic acid, water, a surfactant, and a higher alcohol is filled in a first liquid concentrate filling space of the double structure container, wherein the higher alcohol is selected from the group consisting of lauryl alcohol, myristyl alcohol, cetyl alcohol, cetostearyl alcohol, arachyl alcohol, behenyl alcohol, oleyl alcohol, jojoba alcohol, stearyl alcohol, cholesterol, phytosterol, lanolin alcohol, octyldodecanol, hexyldecanol and isostearyl alcohol, and mixtures thereof; and the organic acid being contained in a content ratio of 0.5 to 15.0% by mass per 100% by mass of the first liquid concentrate composition; a second liquid concentrate composition containing a hydrogen carbonate, water, a surfactant, and a higher alcohol is filled in a second liquid concentrate filling space of the double structure container, wherein the higher alcohol is selected from the group consisting of lauryl alcohol, myristyl alcohol, cetyl alcohol, cetostearyl alcohol, arachyl alcohol, behenyl alcohol, oleyl alcohol, jojoba alcohol, stearyl alcohol, cholesterol, phytosterol, lanolin alcohol, octyldodecanol, hexyldecanol and isostearyl alcohol, and mixtures thereof; and the hydrogen carbonate being contained in a content ratio of 0.5 to 15.0% by mass per 100% by mass of the second liquid concentrate composition; and the first liquid concentrate composition discharged from the first liquid concentrate filling space and the second liquid concentrate composition discharged from the second liquid concentrate filling space are mixed to form a foam. the propellant filling space in the double structure container is filled with a propellant composed of a compressed gas; a first liquid concentrate composition containing an organic acid, water, a surfactant, and a higher alcohol is filled in a first liquid concentrate filling space of the double structure container, wherein the higher alcohol is selected from the group consisting of lauryl alcohol, myristyl alcohol, cetyl alcohol, cetostearyl alcohol, arachyl alcohol, behenyl alcohol, oleyl alcohol, jojoba alcohol, stearyl alcohol, cholesterol, phytosterol, lanolin alcohol, octyldodecanol, hexyldecanol and isostearyl alcohol, and mixtures thereof; and the organic acid being contained in a content ratio of 0.5 to 15.0% by mass per 100% by mass of the first liquid concentrate composition; a second liquid concentrate composition containing a hydrogen carbonate, water, a surfactant, and a higher alcohol is filled in a second liquid concentrate filling space of the double structure container, wherein the higher alcohol is selected from the group consisting of lauryl alcohol, myristyl alcohol, cetyl alcohol, cetostearyl alcohol, arachyl alcohol, behenyl alcohol, oleyl alcohol, jojoba alcohol, stearyl alcohol, cholesterol, phytosterol, lanolin alcohol, octyldodecanol, hexyldecanol and isostearyl alcohol, and mixtures thereof; and the hydrogen carbonate being contained in a content ratio of 0.5 to 15.0% by mass per 100% by mass of the second liquid concentrate composition; and the first liquid concentrate composition discharged from the first liquid concentrate filling space and the second liquid concentrate composition discharged from the second liquid concentrate filling space are mixed to form a foam.