The impact of social conformality on the ethanol preference formation t was studied in the animal model with selective alcoholization of some animals among three-housed rats. In some groups, only one of the three rats consumed 10% ethanol solution, while others got water; in the other groups only one of three rats consumed water, while the other two received alcohol. In the control groups either all three rats received ethanol or all three rats received water. The difference in the level of ethanol preferences in group and individual consumption rats was revealed. Group consumption of alcohol leads to the formation of alcohol preference. In contrast, single consumption did not differ from the control. Among the rats who consume water alone a tendency to increased alcohol consumption compared to control was observed. The experiment showed the importance of the social conformity factor in the alcohol preference formation in rats.