PROBLEM TO BE SOLVED: To provide an aerosol composition which forms a great number of independent soap bubble-like foams when jetted, and can adjust the size and falling speed of the formed soap bubble-like foams, thereby can restrict the space where the soap bubble-like foams float, which enhances the removing efficacy of floating matter from the space by making suspended matter floating in the space e.g., house dust and pollens adhere to the foam and fall to the ground, and which can make the falling appearance checked with eyes.SOLUTION: This foamable aerosol composition includes an aqueous stock liquid containing a surfactant and liquefied gas, and forms a great number of independent soap bubble-like foams when jetted, wherein the liquefied gas is heavy liquefied gas of 0.80-1.30 (g/mL) liquid density at 20°C and contained by 10-90 mass% in the aerosol composition.
