To provide a method for producing a solid soap containing bubbles, stable in the dynamic change in a short time involved in a step for filling a molding mold with a liquid soap, and having excellent moldability.

The method for producing the solid soap containing bubbles by using a production apparatus equipped with a formulating vessel of the liquid soap, a foaming machine, a feed vessel, an injection part and a pressurized feed-stabilizing vessel, and having a circulating line formed by connecting the feed vessel, the injection part and the feed-stabilizing vessel with circulating pipe lines includes foaming the liquid soap fed from the formulating vessel by the foaming machine, once storing the foamed liquid soap in the feed vessel, and filling the molding mold with the foamed liquid soap from the injection part through the feed stabilizing vessel while circulating the foamed liquid soap in the circulating line to mold the foamed liquid soap.