The relevance of work, the basic spheres of artificial air ionization in human life, the main aspects of air ionization in medical practice were determined. Comparative description of the known devices of determination of light air ions concentration was conducted, their advantages and disadvantages were defined, the ways of elimination of these drawbacks were marked. Taking into account the studies the own version of the device for measuring the concentration of light ions in the artificial air ionization was developed. The basic technical indicators of the developed device for measuring of light air ions concentration were given, comparative description of the developed device was conducted with the known meters of air ions, which showed that the developed device provides much lower measurement error (5 %) than analogues, at the same time it has wider measuring range, provides the possibility to measure at the certain point of space, increases the sensitivity of the system to 100 ions/sm3, at the cost price of development not more than 3000 USD., while analogues cost more than $1000. Actuality of the use of the developed air ions meter has been proven for monitoring the level of light air ions concentration in the zone of impact on a patient.