This is a method of applying the external preparation for skin in order to evaluate the properties of the external preparation for skin applied external preparation for skin on the skin substitute film or skin, can be obtained by irradiating light to the skin substitute film applied, the skin or a second coating steps spread over in one direction from a direction perpendicular to the first coating procedure will spread in one direction from the side of the skin substitute film, and a direction spread by the first coating step, the first and a repeat procedure is repeated a predetermined number of times the second coating step and a coating step.皮膚又は皮膚代替膜に皮膚外用剤を塗布し、塗布された前記皮膚代替膜に光を照射して得られる前記皮膚外用剤における特性を評価するための皮膚外用剤の塗布方法であり、前記皮膚又は皮膚代替膜上の側面から一方向に塗り広げていく第1塗布手順と、前記第1塗布手順により塗り広げた方向と垂直な方向から1方向に塗り広げる第2塗布手順と、前記第1塗布手順及び前記第2塗布手順を所定回数繰り返し行う繰り返し手順とを有する。
