The present invention relates to a cryopreservation (freezing) medium which can be used for long-term storage of cell lines, tissue samples, sperms, oocytes and embryos. The invention enables to freeze and store cells without affecting cell viability, to increase cell viability and to protect multipotent properties of the cells. The invention facilitates freezing and storing sperms, eggs, embryos, plant cells and materials, cancer and sensitive cell lines, stem cells (embryonic and mesenchymal), blood and blood cells and biological material and organs.