An aqueous emulsion comprises as the disperse phase obtained by emulsifying a mixture consisting of (A) a linear organosilicon polymer whose main chain is composed of diorganosiloxane units and alkylene units and (B) an oil that is liquid at room temperature. The emulsion can be produced by emulsifying a mixture of (a) a diorganopolysiloxane having silicon-bonded hydrogen atoms at the two ends of the molecular chain, (b) a diolefin or diorganopolysiloxane having silicon-bonded alkenyl groups at the two ends of the molecular chain, and (c) an oil that is liquid at room temperature and does not contain hydrosilation-reactive groups, in water, and, in this state, component (a) and component (b) are addition-polymerized using (d) a hydrosilation reaction catalyst. Cosmetic materials incorporating such aqueous emulsions possess excellent lubricating properties, good dispersibility, and adherence a method of preparation of the emulsion and skin and hair cosmetic materials prepared from the emulsion with excellent sensation of smoothness and moistness to the touch.
