By method oscillovasometry the level and the mark of asymmetry of arterial blood pressure of 69 people aged from 18 fill 23 was studied on lower and upper limbs and circadian variations of these indicators. Groups of examined people with similar patterns are made out. The level and the mark of asymmetry of arterial blood pressure are investigated by the functional probe: before and after working with the right hand. In the work possible mechanisms of asymmetry of arterial blood pressure are discussed.