Abstract: The subject of this research is the memoir heritage of Tatiana Lvovna Shchepkina-Kupernik. The novelty is defined by the absence of works dedicated specifically to the theatrical memoirs of Tatiana Lvovna Shchepkina-Kupernik. This article examines her memoiristics as part of the history of Russian theater, which allows the researchers to determine the author's contribution to the Russian theater studies. The goal of this consists in drawing attention of the audience and researchers to the memoiristics of Tatiana Lvovna Shchepkina-Kupernik, as well as in describing the role of her theatrical memoirs within the Russian literary studies and the history of Russian theater. Analysis is conducted on the key peculiarities of the memoir heritage of T. L. Shchepkina-Kupernik: stylistic uniqueness, attention to details of the theatrical culture, mastery of sculptural portraits. The author also reveals fascinating rare facts about the prominent figures of art and theatrical events of the late XIX – early XX centuries. The conclusion is made that the memoirs of T. L. Shchepkina-Kupernik represent a rich source on the history of Russian theatre. The details of theatrical culture, in-depth analysis of acting, portraits of the outstanding figures of Russian and foreign culture – all these facts makes her memoir heritage an invaluable material that contributes to the study of the Russian theatrical art.