The purpose of the present invention is to provide a foam forming aerosol product that can be applied with a high degree of safety regardless of the usage environment that has excellent storage stability and that is capable of easily forming a satisfactory foam. This foam forming aerosol product is characterized by being provided with a double structure container provided with a discharge mechanism having a propellant filling space and two stock liquid filling spaces the discharge mechanism for simultaneously discharging contents filled into the two stock liquid filling spaces a propellant comprising a compressed gas being filled into the propellant filling space a first stock liquid composition containing 0.5 15.0% by mass of an organic acid being filled into a first stock liquid filling space a second stock liquid composition containing 0.5 15.0% by mass of a bicarbonate substance being filled into a second stock liquid filling space and a foam being formed by mixing of the first stock liquid composition discharged from the first stock liquid filling space and the second stock liquid composition discharged from the second stock liquid filling space.
