Abstract: The present invention is related to a body cosmetic composition used for enhancing elasticity of the skin and losing a weight, and its producing method, in which the body cosmetic composition includes the marine plant's extract including various ingredients such as calcium, potassium, iodine, selenium, alginic acid, and the like, extracted from brown seaweed, sea tangles or combinations thereof, the loess's extract including silica, aluminum, magnesium and various minerals obtained from the loess, and the shell's extract extracted from oyster shells, mussel shells, bivalve shells and combinations thereof. The cosmetic composition provides elasticity in excessively sagged muscles, has an effect on losing weight, contributes to prevent the skin from aging by providing the inorganic substance, the mineral and the like for skin cells through the capillary vessel connected to the skin, and further give effects to maintain physical fitness.