The present invention relates to a cosmetic composition containing a Rubus coreanus extract as an active ingredient, and more particularly to a cosmetic composition containing an extract from Rubus coreanus processed by traditional oriental medicinal processing technology, in which the Rubus coreanus extract has an excellent effect of reducing skin wrinkles by inhibiting the formation of SNARE complexes and the release of a neurotransmitter. The cosmetic composition has excellent stability in formulations compared to conventional products for reducing skin wrinkles and exhibit effects similar to Botox which has been used to reduce skin wrinkles, thereby greatly reducing skin wrinkles without causing adverse effects.