The purpose of this paper was to describe the interaction of two persons in the hand-to-hand fight. The method of the problem's solving - the creation of the working model of such an interconnection on the base of the available knowledges about the human organism's physiology and about the regulations of movements' realization. In this case a human body in his relation to mentality is considered as a complicated instrument with the weak and strong sides so characteristic of it. The represented model corresponds with the contemporary scientific views on the problem and allows to elucidate: - system-structural approach of actions' building; - multileveled, blocks type of motor action's building; -organic joining of the executive and controlling structures in solving of the above mentioned problem.