The problem of the present invention is to provide a composition which shows a sufficiently high enhancing effect on transdermal absorption of a drug, particularly, a composition which shows a sufficiently high enhancing effect on transdermal absorption of a drug in a patch preparation.A composition for enhancing transdermal absorption of a drug of a patch preparation, containing a higher alcohol having 14 - 20 carbon atoms and a polyvalent alcohol having 3 - 8 carbon atoms.
