The invention discloses a floating soap. The floating soap comprises, by weight, 10 to 60% of fat, wax or aliphatic acid, 1 to 40% of an alkaline substance and 0 to 20% of an additive, with the balance being water, wherein fat is one or more than one selected from a group consisting of animal fat, plant fat and synthetic fat, and the alkaline substance is one or more than one selected from a group consisting of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, triethanolamine and arginine. According to the invention, soap preparation and foaming are integrated, so production efficiency is improved, cost is saved, uniformity of a soap body is improved, and product production is more stable. The floating soap provided by the invention meets common cleaning demands, can be made into a personal care product with efficacy, and is floatable, convenient to carry and full of fun; and even if the size of the floating soap is small, the floating soap does not slip into water, so waste is avoided, resources are better used, and better environmental protection performance is obtained.