596398 Disclosed herein is a entanyl-containing patch for external use, the patch comprising an adhesive layer which comprises: fentanyl, 5 to 50% by weight per total amount of the adhesive layer of a styrene-isoprenestyrene block copolymer, 30 to 60% by weight per total amount of the adhesive layer of a tackifier resin consisting of a rosin resin and a terpene resin ,and 5 to 40% by weight per total amount of the adhesive layer of a softenerconsisting of polybutene and liquid paraffin, wherein the ratio of the rosin resin and the terpene resin is within the range of 4:1 to 1:1. Specifically wherein the rosin resin is hydrogenated rosin glycerol ester.
