[PROBLEMS] To improve the stability of a natural type sex hormone and the permeation in a transdermally absorbable preparation containing the natural type sex hormone to thereby increase the systemic effect and the long-acting property of the preparation. [MEANS FOR SOLVING PROBLEMS] The preparation comprises a natural type sex hormone, a polyoxyethylene oleyl ether having a molar number of ethylene oxide units added of 20, at least two kinds of oily ingredients selected from the group consisting of diisopropyl adipate, cetyl alcohol, benzyl alcohol, and propylene glycol dicaprate, a polyhydric alcohol, and ethanol.
