The paper provides a description of archival materials related to Liya Yakovlevna Krizhevskaya in the Manuscript department of the Science Archive IHMC RAS. Most of them represent the results of her longstanding fieldwork in many archaeological expeditions in different regions of Russia. During more than 40 years of active fieldwork L.Y. Krizhevskaya was involved in excavations at many Neolithic archaeological sites in different parts of Russia from Tver region to East Transurals. The archival materials include the fieldwork documentation - archaeological reports, diaries and field drafts. They cover the wide period of time from 1947 to 1987 and are related to Valda-ian, Bashkirian, South Ural, Steppe Neolithic and other expeditions. Besides, other types of documents are kept in the Manuscript department: the papers of collections submission from her excavations to the museums and a personal file of L.Y. Krizhevskaya containing the biographical materials.