Sunflower is the main oilseed crop in Russia and serves as a raw material for the production of vegetable oil. In order to increase field germination, plant safety, increase the yield and oil content of seeds, chemical and biological preparations are used that are not completely absorbed by plants and remain in the soil, where they accumulate and have a negative impact on the environment. To increase the conditioned qualities of seeds, electrophysical methods of their pre-sowing treatment are used, which accelerate the processes of germination in the seed and suppress the pathogenic microflora. Depending on the morphological features of the seed structure, it is necessary to set the processing modes for each culture, in which the greatest technological effect is achieved. (Research purpose) The research purpose is in studying the effect of the electric field of alternating voltage of industrial frequency 50 Hertz on the laboratory germination of sunflower hybrid seeds and searching for effective treatment modes. (Materials and methods) The SKAT-70 device was used as a source of high alternating voltage, the seeds were placed in a chamber between the electrodes, which, after processing, were placed in Petri dishes and germinated in a thermostat. (Results and discussion) The electric field strength in the experiments varied from 2 to 10 kilovolts per centimeter, in increments of 2 kilovolts per centimeter, and the seed treatment time from 15 to 105 seconds with an interval of 15 seconds. At a voltage of 2 kilovolts per centimeter, laboratory germination increased slightly, the maximum values were achieved at a voltage of 6-8 kilovolts per centimeter and the exposure time was from 60 to 90 seconds. (Conclusions) Effective processing modes are processing during 90 seconds at an electric field strength of 6 kilovolts per centimeter, and processing during 60 seconds at a voltage of 8 kilovolts per centimeter.