PROBLEM TO BE SOLVED: To provide skin external preparations effective for antiaging and improvement of skin functions from both surfaces of epidermis and dermis.SOLUTION: The invention provides: a collagen production accelerator and a hyaluronic acid production accelerator that contain jellyfish mucin as an active ingredient; and skin external compositions containing these agents.SELECTED DRAWING: None【課題】真皮と表皮の両面からの皮膚機能の改善と抗老化に有効な皮膚外用剤を提供すること。【解決手段】クラゲムチンを有効成分として含有する、コラーゲン産生促進剤、ヒアルロン酸産生促進剤、ならびにこれらの剤を含む皮膚外用組成物。【選択図】なし