The species of the genus Mentha have been known since ancient times and have significant value in the pharmaceutical, cosmetic and food industries, as well as in medicine. For the widespread use of mint, including in a variety of breeding programs, and the preservation of genetic diversity, effective methods of maintaining cultivars and collection samples are required. Thanks to the development of biotechnological methods, in particular, the creation of slow-growing collections, are now actively used as an effective alternative to field collections. It is known that the cultivation of tissues and organs on artificial culture media can cause somaclonal variability. The purpose of this work is to study the effect of in vitro storage at 4-6°C without illumination after 3 and 4 in vitro conservation cycles on the genetic stability of three cultivars of mint Azhurnaya, Bergamotnaya and Zagrava using ISSR primers. 1 cycle: 1 year of in vitro conservation, microcutting and 2 subcultures of regrowth in a culture room. After conservation, the number of viable explants was 70.0-82.1%. Callus formation at the base of the shoots was not observed in any of the cultivars. After 3 and 4 cycles of in vitro conservation, genetic stability was assessed using 11 ISSR primers. It was found that all three mint genotypes showed full compliance (length and number of amplicons) with the profiles of control samples for all studied markers. It was also found that the markers used by ISSR are highly informative for mint cultivars.