The study examines the issue of aging as reflected in the repertoire of Noh theatre. The analysis of the “old women plays” is based on the aesthetic concept of beauty of old age (rojaku) as particularly rare form of vanishing. Another question raised in the study is the beauty of performance of an aging actor. The author of this study applies conceptual approach to explain the fact that the theme of old poet stands in the centre of actually three of the five plays on her. The by-product of the study is the revelation of morphological proximity of two plays, Sumidagawa and Sotoba-Komachi, which may have an impact on dating and clarification of the authorship.