Abstract: The object of this research is the problem of gas filtration in permafrost formations. Currently, geocryology identifies the movement capability of gas fluids is only within the thawed formations. The subject of this study is the processes substantiating and accompanying redistribution of gas in the gas emission craters, as well as in the samples of artificial ice exposed to gas pressure. The authors examine the summarized data on the structure of craters and conditions for their emergence such as: the zones of accumulation of subterranean gas with abnormally high pressure in the permafrost strata; filtration of gas into high-temperature frozen rocks and subsurface ice; formation of gas-saturated ice soil rods and their explosive destruction. Particular attention is turned to the laboratory examination of gas filtration in frozen rocks and ice. The main research method became the comparative data analysis on the changes of properties of the frozen soils and ice as they war up within negative temperatures. Exploring the samples of ice exposed to gas pressure, the authors apply the methods of textural and structural studies in the passing, reflected and polarize light. It is established that the frozen rocks and subsurface ice allow gas filtration in the conditions of forming the corresponding ratio of characteristics of the rocks (strength, deformative, structural) that depend on their temperature and pressure of the underlying soil gas. It is revealed that the aforementioned ratio is determined by the geological, landscape and climatic conditions. With the help of structural studies, the authors are first to describe the processes accompanying gas filtration within ice in the laboratory conditions.