A transdermal absorption promotion composition comprising the following components (a), (b), and (c) and a transdermal absorption preparation comprising the following components (a), (b), (c), and (d) are disclosed. (a) propylene glycol (b) a polyol fatty acid ester (c) lauromacrogol (d) a drug component <；??>；The transdermal absorption promotion composition and transdermal absorption preparation not only exhibit an excellent transdermal absorption promotion effect, but also exhibit superior skin-permeability, even if a drug having a relatively high lipophilic property and poor transdermal absorbability is used, exhibit a favorable feeling of use, and are safe and stable.
