The present invention provides a technology for delivering a ceramide across the horny layer to sufficiently exert the effects of the ceramide. Specifically, the present invention provides a skin external preparation comprising a ceramide, which enables sufficient delivery of a ceramide comprised in the skin external preparation across the horny layer to near the dermis when the skin preparation is applied on the skin surface. A skin external preparation of the present invention comprises a ceramide, an organically modified clay mineral, a diester of N-acylglutamic acid, and a phytosterol as essential components and in the form of water-in-oil emulsion.本發明提供一種遞送神經醯胺通過角質層以充分發揮神經醯胺效果之技術。具體而言，本發明提供一種包含神經醯胺之皮膚外用製備物，當此皮膚製備物被塗敷於皮膚表面時，其能夠充分遞送包含於皮膚外用製備物中的神經醯胺通過角質層至接近真皮。本發明皮膚外用製備物包含神經醯胺、經有機修飾黏土礦物質、N－醯基麩胺酸之二酯、及植物甾醇作為基本組份且為一種油包水乳液之形式。
