Cosmetic composition for rejuvenating the skin and corresponding method and uses. Cosmetic composition for rejuvenating the skin ("antiaging") comprising a retinoic acid precursor from the group made up of retinaldehyde, retinol, retinyl retinoate and retinyl esters, and melatonin. The invention also relates to a method for rejuvenating the skin, and to some uses of these compositions. The cosmetic composition has the effectiveness of an equivalent pharmaceutical product that comprises retinoic acid, but it is exempt of its side effects. The addition of other groups of substances, such as for example anti-inflammatories (such as liquorice extract, alpha-bisabolol, azulene, glycyrrhetic acid, aloe vera extract and rosmarinum oficinalis extract), anti-oxidants (like green tea extract, resveratrol and elagic acid) and vitamins (like vitamin E and vitamin C), all authorised for use in cosmetics, enhance the "antiaging" action of the composition.