Narrated about the operation of the therapeutic complex built on the basis of the potash mine of the PA «Belaruskali» First Production Unit. The speleocomplex includes the underground speleocuring section and the surface stationary block. It is marked that the curing effect while having the speleotherapy is secured by the impact of the underground speleocomplex specific ecosystem on the sick man body, this ecosystem is characterized by stable microclimate, favourable gas and ion air composition, absence of the pathogene microflora , as well as protection of the sick man from the unfavourable complex impact of environment ecological factors of the natural and technogene origin.