In this work, I dealt with the impact of hunting pressure on the activity of red deers (Cervus elaphus) in Doupov mountains. The main goal was to find out, whether intensive killing will change the activity of deers, and also hinds. Evaluated data should be useful for easier reduction of these animals not only in Doupov Mountains. Numbers of deers have been very high in the last few years and it would be necessary to achieve effective reductions, which would reduce the population to a tolerable limit. That should contribute to decreasing animal causes in forests and agriculture crops. Decreasing the numbers of deers should also lead to improving the quality of this spiecies not only in terms of trophies, but also the overall physical condition. It turned out that the activity decreased significantly during hunting. The reduction of activity began basically with the sunrise and ended in the sunset. For most individuals the activity increased in the night hours. In both July and August it turned out that there is a significant difference in activity among both day and sunset as well as day and night, while the lowest amount of activity was in the daytime, and in the sunset it has increased significantly. The highest activity was basically at dusk. From these results we can say that when comparing the two periods, the significant activity is mainly in the evening and night hours.