PROBLEM TO BE SOLVED: To provide a highly safe and efficiently producible agent for excellently promoting the production of type-I collagen, and to provide an external composition for the skin and a cosmetic each containing the agent.SOLUTION: An agent for promoting the production of collagen includes an enzymatically decomposed product of a swallows nest as an active ingredient.COPYRIGHT: (C)2014,JPO&INPIT【課題】効率的に生産でき、かつ安全性の高い、優れたI型コラーゲンの産生促進剤、およびそれを含む外用剤および化粧料を提供することにある。【解決手段】本発明によるコラーゲン産生促進剤は、燕窩の酵素分解物を有効成分とする。【選択図】なし