PROBLEM TO BE SOLVED: To provide an angiotensin II receptor antagonist and a percutaneous administration formulation having excellent percutaneous absorbency.SOLUTION: The present invention provides tert-butylamine salt or diethylamine salt of an angiotensin II receptor antagonistic substance, and a percutaneous administration formulation comprising the same.SELECTED DRAWING: None【課題】経皮吸収性の良好なアンジオテンシンII受容体拮抗剤及び経皮投与製剤の提供。【解決手段】アンジオテンシンII受容体拮抗物質のtert-ブチルアミン塩又はジエチルアミン塩、及びこれを含有する経皮投与製剤。【選択図】なし