For delicate applications of cryosurgery utilizing freezing of the tissue by liquid nitrogen in facial or eye medicine, and/or dermatology, a low-weight, small-dimensioned, cordless instrument provided with electronic controls has been designed. The instrument with one filling of about 30 ccm of LN2 can devitalize up to about 5 grams of tissue to necrosis in a few minutes. The function and construction of the instrument is explained and the results of its technical tests are presented.