The paper explores the phenomenon of rock art found in and around rock art cavities in Trans-Baikal region of South-East Siberia. Although many researchers noticed that caves have had a special value in cultures around the globe, no research has been carried out specifically into the cave rock art of Trans-Baikal which was not distinguished from other rock art found in open localities and shelters. This study was conducted based on field data collected by the author in 2017. In order to answer the question whether the cave sites had a specific role in the cultures of Bronze Age Trans-Baikal, the sets of motifs of the cave sites were compared to those of the closest open sites. Drawing on the stylistic difference revealed by the analysis and landscape context, it is suggested that the cave rock art sites could be places where rituals of more restricted nature took place. Ethnographic records may imply that these ceremonies were aimed at the fertility increasing being performed by shamans or shamannesses or without their assistance. It is also possible that the ceremonies could be gender-exclusive, conducted only for women, although this interpretation needs further research.