THE PRESENT INVENTION PROVIDES A TRANSDERMAL DELIVERY SYSTEM, WHICH COMPRISES A DRUG-CONTAINING MATRIX LAYER COMPRISING: GALANTAMINE OR ITS PHARMACEUTICALLY ACCEPTABLE SALT AS AN ACTIVE INGREDIENT; AND A STYRENE-BUTADIENE-STYRENE COPOLYMER OR A STYRENE-ISOPRENE-STYRENE COPOLYMER AS AN ADHESIVE. (FIGURE 3)