Millimeter radiation (MMR) is characterized by non-thermal, regular and informational influence on biological objects leading to the increase of their viability. Centrefor Plant Genetic Resources has studied for many years the influence of MMR on seed viability after their long-term storage. Influence of millimeter radiation with various exposures and wavelengthson seeds under the conditions of ex situ conservation has been studied in our previous works (Corlateanu, Maslobrod, Ganea, 2009, 2011). Stimulation of germination processes using MMR was found in seeds of various plant species. Thisreport gives the results of MMR application with various power densities. The aim was to find optimal value of MMR power density for radiation of chickpea seeds. Experimental objects were collection accessions МDI 02444 and CN 36 stored in gene bank for 12 years. Chickpea seeds were influenced by MMR with the wavelength of 5,6 mm, radiation exposure of 8 min and power density values being 2,0; 2,4; 2,8; 6,6; 8,5 and 10,4 mW/cm2. Seeds were let germinate in ther mostat in Petridishes with distilled water under 20оC.150 seeds were used in each variant of experiment. Germinating power and germinability were recorded on the 5th and 10th day according to ISTA international methods. Experiment with МDI 02444 seeds showed that MMR had stimulating effect on seed germinating power under every studied power density except for the lowest one – 2,0mW/ cm2. The highest effect on seed germinating power was revealed in variants with power density of2,4 and 2,8 mW/cm2 (1,27 and 1,33 times higher as compared to control). Oneofthebestvalues of power density as regard to its influence on seeds germinating power was MMR power density of 10,4mW/cm2(1,23 times higher as compared to the control). Seed germinating power was about the same as control under power density of 6,6and 8,5 mW/cm2. Sothe best results on seed germinating power were obtained using MMR with low power density values – 2,4 and 2,8 mW/cm2. Seed germinability in these variants was higher than in control by 13,0 and 17,0%, respectively, and by 12,0% in case of MMR power density of 10,4 mW/cm2 that is also a positive finding. Minor inhibitory effect on germinating power and germinability of seeds was manifested only in variant with the lowest power density of 2,0 mW/cm2. The same experimental design was used in experiments with the other chickpea form – CN 36. Stimulating effect was revealed only in some of the variants of MMR radiation. Prevalence with regard to seed germinating power was found when 2 power densities were applied – 2,4and 2,8 mW/cm2. In the secases the said parameter was higher by 6,0 and 10,0% as compared to the control. Inhibition of effect was revealed in other variants of experiment. Determination of seed germinability showed that variant with power density of 2,4 mW/cm2 was at the control level, and the highest stimulation of germinability was found with power density of 2,8 and 10,4 mW/cm2 (1,4 and 1,3 times higher as compared to the control). Since the revealed effect was approximately the same, there foreitis reasonable to recommend the lower power density for chickpea seed radiation, and namely 2,8 mW/cm2. In summary, it was demonstrated that millimeter radiation exerts stimulating effect on germination processes of chickpea seeds under their ex situ conservation. Reveale deffec to flow power densities of millimeter radiation undoubtedly is a positive finding and evidence in favor of economical efficiency and feasibility of this method.